A glitch that I found make you invulnerable to spikes when they are attached to a wall. To do this glitch you must be right against the left side of the wall where there are no spikes. There are left-facing spikes above you along the wall. As long as you don't move left or right, you can jump straight up and not die immediately. I don't know if this is for a certain map, but this a bug you might want to look at.
Now that weapons do their appropriate damage, you need to add a system where you can make enemies more difficult. I t would also be a good idea to add more enemy types into the game.
 "Doodle God Blitz"){kind=icon}
 "Mototrial: USA"){kind=icon}
 "The King of Towers"){kind=icon}
 "Robot Wants Ice Cream"){kind=icon}
 "Cash Out!"){kind=icon}
 "Bush Whacker 2"){kind=icon}
 "Idleplex"){kind=icon}
 "Sandbox Hero"){kind=icon}
 "Realm of the Mad God"){kind=icon}
AGAIN?