the game is ok but it desperately needs a better explanation for all of its mechanics.
i'm making a review for this specifically to add what i managed to find while playing, for future reference.
game starts with a (seemingly) unskippable cutscene and a whole pseudo-minigame that is wholly unnecessary imo. you need to interact with the e-mail you get and confirm to get started with the actual game.
you're the small lightbulb, and you move with arrow keys or wasd. it takes a while for the character to start moving, like there's some sort of friction on start-up.
spacebar is used to toggle the light on/off, which is the main mechanic of the game.
you have 2 separate bars to keep track of: you energy bar, which depletes overtime while the light is on, and your actual hp.
there are lightbulb boxes scattered around the map: these are checkpoints; when you die, you respawn to the last checkpoint you touched.
if you die due to your hp depleting, you should respawn with 3 hearts.
if you die due to your energy depleting, you respawn to the last checkpoint with the same amount of hearts you had.
the main objective of the game (i think) is to roam the map and collect lightbulbs.
while the light is on, your energy is constantly depleting so you need to turn off the light otherwise you'll "die".
while the light is off, you can walk freely but you won't be able to see any walls. it's also difficult to see in general so you'll want to walk around with the light on most of the time anyway.
while the light is off, you can press X to drop a "night light". these are supposed to be markers but they don't do much besides telling you that there "isn't a wall where you dropped one". they don't really illuminate your path in the dark in any way, and dropping one also consumes energy, so you're better off just walking with the light on. basically, they're mostly useless.
you can recharge your energy while standing on a battery. batteries can be found around the map, and are likely limited in number.
while the light is on, you can press B while standing on a battery to collect said battery; collecting a battery costs one heart. if you have only 1 heart left, you cannot collect a battery. you can hold up to 3 batteries at once.
while the light is off, you can drop a battery on the ground. this costs nothing, and you can drop a battery anywhere as long as you hold one. this means you can walk around with the light on while holding batteries, drop one when you need to recharge your energy, then trade one heart to pick back up the battery until you reach the next checkpoint.
while highly annoying, it's still the preferred way to move around the map rather than doing it blind imo, which invalidates the whole on/off mechanic;
not because you can do it, but because having the light off is so annoying and not worth it, it's still better to juggle your energy and hp with the lights on than to deal with that.
now to the main issue, and the whole reason i made this. to get out of the first room at all, you need to open doors. to open a door you need a key. to get the key, you need to bring it 3 "eyes".
the "eyes" are those red ball enemies that you can find around the map.
they will follow your position while the light is on, and will not follow you with the light off.
if they touch you, they will also drain your energy, which makes the whole endeavor extra annoying.
you need to lure 3 eyes to the key so that the key will follow you, then lure the key to a door to open it. the key will follow you regardless of the light being on/off.
the eyes also seem to not be able to cross batteries in their path, so if you dropped a battery and are unable to pick it back up, you'll need to do a whole lot of backtracking until you get an extra heart to pick it back up so you can continue luring them.
this whole system is not explained anywhere and honestly is one of the main problems of the game.
another problem comes with the level design: once you're past the first door you're met with spike traps and spider? enemies. if you touch them, you lose hp. i can't tell if the spider enemies also drain your energy, but they will follow you regardless of the light being on/off. fortunately i've found you can kill them by dropping a battery on your position while they're onto you, otherwise they'd be extremely irritating to deal with.
the spike traps however are terrible: once you walk over a spike trap, it triggers and hits you for one heart. unless you're walking straight over it laterally without stopping, you will be hit. if the trap is much bigger than your character, you will be hit regardless. once a trap is triggered, it will not reset even on death, meaning it becomes an impassable wall which deals damage to you if you come in contact with it again.
this is problematic for a number of reasons, due to some checkpoints being surrounded by these traps, meaning you'll be hit almost immediately when respawning, and also locking out some paths once triggered even accidentally. spike traps won't trigger if you're walking over them with the light off, but you also won't be able to see them until you turn the light back on.
once the light is on, spike traps which have been stepped over even in the dark will trigger regardless, and become an impassable damaging wall.
i've only managed to explore the right side of the map so far, but i can say that the rooms layout is kind of all over the place. specifically, the first room on the right has a whole lot of very narrow corridors surrounded by spikes, which also happen to be unnecessarily long.
the room right after, which is the middle room that can be accessed from different doors, is entirely too big and difficult to navigate (i got completely lost).
also because i used the key to enter said room from the top right, it seems i soft-locked myself as i wasn't able to locate any other key to access another room, forcing me to refresh and lose my progress.
between the keys issue, and spikes locking path, there's no soft-lock safety measure.
the lightbulbs you need to collect are fairly noticeable. they have the same designs on the medals, and likely accompanied by some npc characters or at least something that has not been seen before anywhere else. you need to interact with either the npc or the lightbulb itself with X, which if done successfully will get you the corresponding medal, and the lightbulb will start following you.
it seems you need to trade a certain number of hearts of held batteries to get a lightbulb, so it's possible interacting with not enough resources will not work. the specific currency necessary is written on the ground next to the lightbulb.
there are coins scattered across the map, but so far i'm unsure about their purpose.
explosive barrels deal 2 hp on contact. eyes can also trigger explosive barrels, upon which explosion they'll die. it seems eyes can still walk over triggered spike traps with no issue.
there are eyes spawners in the left and middle room that look like space wormholes or something, and are triggered upon standing over them. one problem with these is that they'll spawn infinite eyes as long as activated, and i somehow managed to almost cut myself off from going through the top left corridor due to the room being completely filled with eyes which constantly drain my energy even with the light off.
this is only a first playthrough so i may edit this information as i find stuff, but so far this is all i got
EDIT: soft-locking due to a lack of keys is unlikely, as there are extra keys to access the whole map regardless of which door you open first (not actually confirmed 100%).
they're simply difficult to find because of the map layout, and borderline impossible to get because of all the exploding barrels and rocks killing the eyes and respawning in the worst possible location.
if you happen to go left first, the "flip the switch" prompt boots you into the final boss room with no way back.
it's a point of no return, which would explain why it was previously difficult to achieve getting every lightbulb in a single playthrough.
what's actually possible is soft, locking the bottom right side of the middle room. there's a whole "spike trap maze", except it's not a maze and it's just spike traps.
i can't figure out why sometimes they don't trigger even if i walk over them, but the point is it is possible to trigger all of the spikes at the entrance of the floor. there's also rock enemies which block your path and shoot at you (which seem invincible) meaning dying there is actually extreemyl likely. once you have triggered enough spikes, you are effectively softlocked out of a key and a few other rooms.
honestly the one change this game desperately needs is a revision of how spike traps work. either reset them to the inactive state on death, or at least don't make them a wall. i'm not sure how many invincibility frames there are on hit, but if it's long enough it may still be possible to get past the wall with at least a bunch of hearts, otherwise it's really impossible to deal with.
can confirm all medals work, at least on multiple playthroughs, though some of them sometimes aren't awarded but that's not due to the game.