That was a bug. The idea was there was going to be two options: "Spin" or "Die". Pressing "Spin" gives the player a chance to stay at their current spot and roll without completing a level; however there is the possibility of the player failing and moving back a few spaces. Spin is basically a gamble. Pressing "Die" was supposed to allow the player to complete a combat level so the player can get a roll without spinning. Except the latter doesn't work. The Spin or Die dialog unintentionally appears after the player successfully completes a level. I'll plan to fix this in a future patch. To bypass the bug if you press Spin enough you can cheese through to the ending (in hindsight I probably should add a limit on how much spins the player has).
Based on your comment, clearly the tutorials in-game are not too descriptive. I'll try to make up for that by including a more detailed tutorial on the game page.
Thank you for playing. :)