Great job! It was pretty laggy for me (but I played it in on chromebook with slow internet so I don't blame you ) and it was still pretty fun. There isn't much strategy to the game, just hold down C and run for the health packs but it was still, once again, pretty fun.
Thanks After some waves holding down c and running to health packs won't work you have to hide behind walls, i designed it that way so it will be easy in first levels so people don't get frustrated . I never wan't this to be one of the games that wan't to make you angry to play more.
and for lagging i can create no particle version for chromebook if you want :D so it will lag less.