The controls are a bit slow and clunky but that could just be a part of the game itself, however there are a couple of issues I feel should be addressed, first of all, there should be some indicator of when exactly you are being damaged as you don't die instantly on contact and it can take a while for enemies to kill you or seemingly no time at all. Furthermore, also I feel like a wave level and power-ups would go a long way in making this game more enjoyable as just being the way it is, it would get dull relatively soon, and without any additions or changes to red, it ensures that you will more than likely not be able to break 100 enemies. Another reason for that though, is after a while when there are more creatures on the screen, the bullets start to pass through new targets and it's impossible to tell if those 'invincible' targets are able to still damage you or not either. So ensuring that every enemy still has a hit box would be nice as well, as well as adding definition to where upon each green creature it will count as a 'hit'. Some creatures you can kill at the edge of it but later on it seems as if you have to hit directly in the center of the creature in order for the bullet to connect otherwise it'll just pass right over it. Of course, that may also just be a part of the issue to where you can't hit creatures at all if they are new and there are many other creatures already there, however the older creatures start losing their stability as well to be hit, but bunched all together something is usually hit. So in the end I think there are quite a few fixes that could be made and some additions that would help make it more entertaining though that isn't exactly necessary. The main issue is that the glitches should be looked at a little closer and edited to become a little more manageable.

Enemies always move directly towards you and can occupy the same physical location, and there is no bonus for killing enemies, so it's possible to simply move in a circle ad infinitum as the enemies stack on top of each other. Movement and aiming are coupled, and the firing rate is slow, so there is no hope of killing a significant number of enemies. This could be funner if motion were decoupled from aiming, the game were generally faster, and enemies had varied moving patterns.

good but i cant aim that well fix that will ya? perhaps make aiming with the mouse

meh

Shooting is bad, movement is bad. Everything is bad. Better luck next time as it seems to be your first project.