Nice visuals and the audio has that fun 8-bit chiptune style.
The main battle mechanic presents an essentially meaningless choice. Since the odds of any coin flip are 50/50, it doesn't matter if you pick heads or tails. You could just pick heads each time, and over a large enough sample of coin flips you would get the same success ratio from a statistical perspective.
I think the game would be better if the battles had more meaningful choices.