Thank you so much for your comment! :)
For your first point I 100% agree with it, I wish I had time to implement that because it would avoid a lot of confusion. As for the icons, I originally planned for a limit on the wheel but decided not to, so I didn't think about a better visual indicator for the extremely small sections. The betting could've been optimized a bit more to give more back maybe 3 to 1 instead so if you did bet on the - coins you could gain some more. As for your last point I was also planning on adding a perk/permanent upgrade system to help a bit more with RNG like those games, and also to add and tweak some of the items.
Thank you again! Those were some of the games I was inspired by so I'm glad it felt that way