Good game and visuals!
The OST is probably my favourite thing from the game. It feels surreal and intriguing.

The only suggestion I have to improve the game is to change the gun key settings. Using AWSD and the space key requieres using both hands, so, in order to use the gun with the mouse, you have to quit one hand from the controls to use the mouse. It's not terrible, but it can be improved.

Pretty good considering how short it is. Massive improvement over Lil Balloon though. The controls/jumping felt pretty good, not too slippery. Collisions seemed to work well and be pretty precise (except bullets). For a single level it was pretty spacious and nothing very challenging (good or bad thing depending on how you look at it). The gun shoots through everything, not sure if that is intentional or not, but it didn't feel intentional. Obviously many little things it could use at this point, but the main thing would be expansion into a larger game
adding story and either puzzle elements or more dangerous enemies. Honestly I think the story start is pretty good, except we don't really know what is actually going on, where we are getting out of, or where we are going. Overall good game, again great improvement over your last one. Keep up the good work!