nice game i love it needs just a few updates if u want it to look a better let me explain.
1: change the way the health bar looks its too basic.
2:change the prices they shouldnt be all the same.
3:the game is mouse only u should add options for keyboard too.
4:add a few stuff to to game screen when ever u dive like a radar
5: and perhaps u can add a filling for walls not the cover after that rather then having it black.
other than that Bravo great game for a i approve.