dear author i am a chinese fan of this game. Because my twitter account has been frozen for no reason so i can only contact you by this way
here is my suggestions.
first add some new skills for the playable character such as :get a random weapen when every time born
second add the weapon switch function ,beacuse this can help us save the bullet for special weapons
third the monster "tank" is too overpower
forth i think we should add more health for playable character
last make the room more reasonable