This track captures the spirit of Newgrounds so well. It takes me back to the mid 2000s: fast tempo, acid lines, catchy melody, phat bass, and that quintissential brickwall slamming limiter.
I think most of your mixing issues can be fixed with some high pass filters and other EQ to iron out the spots where instruments are fighting for space, and some dynamic EQ like TDR Nova if it's really spaghetti. Some of the space might clear up by letting off the limiter input, and the sweet spot would not sound any quiter, but that's a stylistic choice.
Your music is super captivating and immersive. Holy moly