Simply incredible. I played this a lot longer than I had planned to. I got to round 20 before I decided to move on. I really appreciate that you let the player feel this powerful, even overpowered. That's the perfect take for a jam game. At first it felt "too broken" because I was one-shotting enemies before they got a chance to take a move, but then the enemy started going first.... and I nearly lost before getting to go! It felt great. Well done!
If I had to give any constructive criticism to help you improve, it might be that having some sort of "bad luck protection" against not rolling red or green dice might help. It felt pretty bad to have my board fill up with grey and green dice when I desperately needed an attack, or vice versa. But even that might be broken. Maybe pay 2 or 3 energy to roll a specific color die? That way you can get what you want but at a premium.
Overall, great job. Keep making games. Be proud of what you've accomplished in just 48 hours!