Bomby the Bomb is my favourite Sonic character
Once you learn the levels it can be quite fun to speedrun trough them. Also I love the design of the main character and the final boss. (Though, I am confused wether or not you can beat it or if it's just an interactive cutscene.)
The biggest issue is the way wall jumping works. For a short period after pressing the jump button you should not be allowed to cling onto walls. Also jumping off the ground while standing next to wall should not make you wall jump.
The only bug I encountered was a softlock in the second level. Jumping to the right off the tiny platform seen in the image gets you stuck.