Pretty much every game I made is at least partially recycled from old bits and pieces; I've used the same set of sounds for female player characters since Tactical Weapons And Tactics.
I don't find the characters badly made, more just not a style I like and maybe a little uncanny valley as well. Frankly, I'm not sure what they're supposed to be and it creeps me out a little.
One of these days I'd love to do another game with voice acting- it's like an instant +10 to production value- but the logistics of it have been too daunting for most of my projects.
I tried to go up a wall in spinning mode, and it worked for a bit and then I couldn't go any further and fell back down (this might have been by design). When I fell onto the ramp I got kinda stuck in that mode and stuck in the ramp for a bit, I think I jumped off and that put things back to normal. The next time I tried, I went up and to one side and just kind of kept going until I came back down a fair deal away and fell out of the map.
I think the place where the lack of depth was most problematic was the series of platforms near the start of the map. It was very difficult to judge how far apart they were and how far I needed to jump. It could be a lack of shadows, but I think there were early 3D games without shadows that played okay so I'm not sure.
I was able to warp into the castle once but couldn't get out and couldn't figure out what to do from there. On my next run I avoided it like the plague.