Don't try to shoot down, the game will get you stuck.
All other issues aside, it is possible to aim and shoot downwards, which essentially breaks the game, as there is apparently no lower boundary.
This sort of error should probably be eliminated before things like medal API are implemented.
This game is very simple and reminds of old games such as this one. Playing this game is good way to use your time. Well programmed and not glitched. Well done.
It keeps freezing after completing the first level. Not good. You need to fix that
Not bad. It did get a little boring though. I'd suggest maybe making it timed and have the screen slowly drop down every once in a while, so that'd it'd be a bit more challenging. Maybe some music too?