You set out to make a coin flipping game fun, and I think you succeeded! The sound effects were fantastic, but what really impressed me were the graphics! 3D with pixel art is a really cool aesthetic!
My only issue was that it seemed fairly easy to spam-click a coin just before it lands to force it into the right face, which could probably be solved with a stronger push force and a cooldown timer. The reset animation also felt fairly slow.
Overall, the game was great, and has a surprising amount of potential! I can almost imagine levels with weirdly shaped coins or even various sided dice!