Hello! I encountered a bug on v0.98.4.
On Mario's Rainbow Castle, if you get reverse shroomed onto the start space, you get stuck there for the rest of the game. At the start of your turn it says you're still under the effects of the reverse shroom and after rolling you move off of start and then immediately back on. When it first happened to me, I got warp boxed off of start after one turn of being stuck, but the reverse shroom continued to take effect for a couple turns before reverting to normal. After that game, I went back to test it and made sure it was repeatable. I figure this bug also affects similar boards, though I didn't test it.
Also, unsure if this is a bug or my luck being weird, but the Judge bonus star seems extremely common for me. It shows up as the first bonus star in almost every game I play. Similarly, the Minigame star also shows up a lot though isn't quite as common and always shows up as the last bonus star. My bonus star ruleset has the game choose 3 randomly, and the only ones not active are chance time and pitygame. All others are +1. And now that I think about it, I'm not sure if I've seen the Slowpoke bonus ever, so could it be that the chance to spawn Slowpoke is accidentally being counted towards Judge since they're next to each other in the list?
Anyways, good job with the game so far! It's really fun!