Congratulations on making your first game! In Java no less! It's a tough undertaking to build a game in 48 hours, even if it isn't your first game. Now that you've had a taste, keep working on it!

Some tips for future jams: I didn't hear any audio, so you'll want to remove yourself from the audio ratings, just to make it easier on your raters. If it's supposed to have audio, then this is a bug report :) If you have time on future entries, it's a good idea to make some kind of start screen that the game can go back to when the game is over. Speaking of game overs, a little bit of feedback about the game ending would be useful! Just a box that says "you hit too many tumbleweeds!" or something. The way the game just *closes* when you lose all your hearts is abrupt and looks like the game crashed.

For others trying to play the game and getting an error, you probably need an updated JDK. Get one over on Oracle's site at: https://www.oracle.com/java/technologies/downloads/ (I was a few versions behind!)