Omg I slaved so much for the cover image hahah I'm a noob at animation and everything but I'm glad it looks alright!! We're thinking of implementing a click and drag system to make the game more user friendly, and yes definitely make the instructions more clear at the beginning...
But I'm rlly sad to hear you couldn't get past the second zombo D: Their speed was a misjudgement on our part... (Steering away from the walls and making a mad dash for it would really help on those maps since the walls slow you down!)
Good luck to your future endeavours in game design!!