It's actually really fun for a simple game! I really liked the animations, gameplay, and it never stops to be amazing until now.
The controls are fluid and it responds to the commands every time, which is GREAT thing because you need to react fast in some of the situations and think whether if you risk getting the gem or wait for the fireball to leave before getting the gem.
The difficulty is hard, but fair and every time you lose it seems like it's even more because of you than the game. I even managed to get 15 gems before losing!
Overall, It's a really fun and awesome game and it never stops being fun. I'm impressed with your game, Sean.
Congrats for this excellent game that you ever made.