Wow, thank you a lot for your comment! That's so great to hear :D And oh you're right, that is for sure a bug that I did not encounter in my testing. Thanks for finding it! I've just uploaded a patch for that issue. Cheers!
P.S. I love the style and sound of your game, it's giving me flashbacks from the miniclip and addictinggames era of web games
Edit: I didn't really fix the bug properly- I just made the impact less game-breaking when it happens on the rock