iA, can you add a option at “Color themes” that allows you to customize items’ colors at the store?
At “Black Hole Skipping/Hopping” wave there’re 4 groups of enemies, all of them come from the same black hole which make them easier to kill. So how about making the 2nd and the 4th group appear from another black hole?
How about you make multi-kill bonus freezes when you damage an enemy? Make it wait to see if you’ll kill it or not.