Nice gameplay and enemies design, my favourite is the "What" wich separated itself into 4 letters..
I would like to be able to keep shooting if i hold shoot button and i think the upgrades prices and loots should not inscrease that much.
1 bug: Health upgrade make me lose all my "?" points then it set my money as a random (?) negative number.
minor bug: I'm an AZERTY player (azerty controls works), so when it ask me to use "q" to continue it's actually "a" for me.