Here's another update, as posted on Discord:
Still considering the level design a bit more for this one though, I like the new aesthetics and animations, but I feel the obstacles need reworking.
Edit: Jesus Christ would you look at the date on the first post in the topic. It's nearly been 5 years, and this thing is still nowhere near done. Hopefully I get it finished in a shorter time frame than Mushroom Kingdom Fusion (at least 12 years) and Brutal Mario (at least 13 years).