A small tip for making even a jam game a little bit more fun to play, is sound - just any sound. Otherwise, I think the idea is very interesting, although it does become a bit dull very quickly. There is promise though - and here's some completely unsolicited backseat designing, but it could be fun if the character had already chosen whether to attack/protect/reflect, but having the job of fudging the numbers in the favor of the heroic party. For 48 hours though, you did make something that's interesting enough to make me *want* you to improve it, which I see as an absolute win!