I wasn't sure what they keybindings were. I automatically press R to reload - and here that restarts the game, which was a bit odd.
Only from the screenshots I knew there were different guns, so I figured 1-4 were different weapons.
I'm not really sure I can kill or damage the red cubes - didn't get enough feedback to tell.
Unfortunately I didn't really get the point of the game - The title is 'Keep them Dead', but I wasn't able to kill the red cubes.
And when I ran through the map I just reached a dead end.
Nice job for succesfully creating a shooting mechanic.
Great job creating a game and submitting!