Did you upload the wrong game?
This game isn't related to the theme and is even called "Challenge_3" in the bottom left.
Anyway, the game doesn't work and the controls do not feel good. Sprites are not locked to their proper axis either and they are flailing about helplessly. Eventually I can't even shoot anymore after shooting for a while. NVM i see that was intentional.
Furthermore, the links you have for the assets are not the same shown as in the game...