Hi! Thanks for playing (and for the bug report)!
It's true, the jam versions had a bug that made it impossible to smash the final three melons (and another one which made overall balance nigh-impossible). We did not report it outright even after noticing because people were still having fun with the game despite that. My apologies for this little bit of mischief on my part ;)
We uploaded a majorly reworked post-jam version (as well as a Web-version) that, I promise, is worth checking out