I really loved the art direction for the game. The atmosphere that you get from the post processing and the music fits really well together. I do think the difficulty is a bit too much and I believe its mainly stemming from the health packs where around wave 2 they become near impossible to collect due to the amount of enemies and your movement speed. Once you kill an enemy at that point the med kit gets trampled by the onslaught behind and once I do loop them around the map the med kit has despawned. I also noticed that you can't pick up med kits while you're invincible after taking damage so that does increase. I do like the last stand mechanic at the end. Really up the tension of reach a new high score.
Despites the bugs good game.