I heard this was your first complete game! Congratulations! It looks great and the sounds are very satisfying. Movement is a bit slidy, like you're playing on ice. The gun is very hard to use while moving, which the level design seems to indicate you should be doing. My personal recommendation would be to remove the F/Shoot key entirely, and make a press of the arrow keys shoot the gun in that respective direction. I feel like this would make it a lot more snappy! I didn't manage to beat it in the 1:00, but I got to the third level, and overall it felt pretty clean aside from what I stated above. Good job!