Hey it's a good game, I have glitches and suggestions:
About glitches: If I kill the first enemy spawned I "Combine" two hordes in one, also I can't get a "Game over screen" I don't know if it was made this way on purpose or not but I wanted to give a good feedback
For sugestions, it's a bit akward to climb, I don't know if making it automatic is easy or not but maybe changing the space bar for the w to jump would make it easier
Hope it can help to develop the game, have a nice day