Thanks!
I have to admit the controls are a bit weird, I am hoping for people to be able to switch the keybinds sometime in the future. The current skill selection system is just a stopgap solution while I try to create a UI for it.
For the difficulty curve, I find it too easy in the beginning but suddenly spiking when the Spawners start showing up, I am thinking of using perhaps a exponential randomizer for the spawning instead of the flat one I am currently using.
Finally, I don't have much experience with designing UI, much of it is from the defaults for the game engine I am using, it should be reworked soon after I get more used to the engine.
Thanks for the feedback! I've moved a few things around on my to do list, I'm glad someone enjoyed my game :)
-Tater