This was mentioned on the Exeter Social Discord group, and it made me curious to see how well it has held up. I played the Mega Drive version, which was what I had when I was younger. I remembered it being pretty mediocre, bad but not as bad as most of the mascot or tie-in platformers of the era. That’s exactly how I found it today as well, the graphics are nice, the music is good but the actual platforming is fiddly and hit boxes are very unpredictable. It’s very short though, only five levels with a few stages each.
The final boss is called Gary Gritter though, that certainly hasn’t aged well.