I want to start by saying that I am a strict critic, so I can get rather cherrypicky, and I can be harsh, and for that I apologize.
First, what you did right. The art's pretty competent, player doesn't feel terrible to control.
However, coins have collision for whatever reason, level design feels lazy and slapped together, the timer doesn't work, and I didn't even know what the dice did till I read the comments.
Don't take this as a bad review... rather, take it as a checklist of areas to improve. Game jams are hard and the time restraint is brutal. Try to lower your scope more until you have more experience.
Sorry for leaving a long-ass review, I appreciate your work, and have a good day.