Giving this a re-evaluation, I'm still about the same with it as I was the first time. I do have a few nagging issues to note.
It's not uncommon for a character to use custom buttons, but I find it so odd that Custom 1 is used for a slightly niche option of an alternative stopping method for taznado, yet a dive move that can slide under short obstacles or give an emergency burst of speed, is put on Custom 2, a considerably lower priority button. I feel like these could have been swapped, or modular via console command, as I found myself wanting to use the dive a lot more than the taznado emergency stop, but I'd have to reconfigure my gamepad to do so.
I also have issue with an aspect of the bubble gum. Unless I'm missing something, I don't see any visual indicator when you actually have it, making it easy to lose track if you DO have it or not. this isn't a problem the burp has, since that has particles spawn. I feel something similar could be done with the gum, or perhaps a HUD element. I do appreciate that Taz has such a potentially crazy shield-like powerup all to himself though. It's been fun to jump and float for so long without landing!
Taz isn't really my kind of playstyle, but I do appreciate you making Taz feel like this spinning top death machine like he usually is. Especially with Taz mode really letting you rip up everything sprite-based in sight. While he can be fun at times, he's probably not something I'd return to much, as I feel like I tapped out on what I'll get out of him already. I do chalk this up as another character that's proof you don't need to create your own whole sprite sheet to make a unique character.
One of the most interesting mods I've seen in a while. Instead of getting another Sonic or another fan-made character with unbalanced abilities, we get a simple and interesting mod that even has its own game mode and unique character sprites. Of course, for the full picture, you need someone who can draw sprites for this mod, but even in this state it looks very cool.
Shockingly fun for such a simple character, however I wish the spinning was "hold spin to go fast" vs "go fast to spin", more like how it was in the original game.
Maybe you could add a taunt? something like blowing a raspberry at the screen when you press a button.
I would also like to note, that spinning in the air breaks walls but dashing on the ground does not, I hope that this is planned because it feels very strange to be unable to break something by just running into it as Taz.
Other than that, good promising mod, I love the extra touch of the bosses having custom sprites.