Robots vs. Evil Zombie Birds by jaspreetdhanjan
You are a flying robot spawned on a random floating island. The objective is to kill the infinitely generated zombie birds before they kill you with their acidic zombie poop! If you're lucky you'll spawn on a island with some shelter!
Maybe you can put an executable file instead of a jar? I don't have a virtual machine on my work computer, so I can't test it right now.
http://ludum.mostlyoriginal.net/tmp/robotsvsevilzombiebirds.jar
http://ludum.mostlyoriginal.net/tmp/robotsvsevilzombiebirds-src-intelliJIDEA.zip
Looks like a resource loading issue from jar. Cheated by moving the files in your packages and changing the paths a bit.
Criticism aside, it's still a fun little game to play. I like how there are multiple maps :)
It's cool how you have to use the terrain!
If you're considering adding audio but don't have much experience with it, consider taking a look at bfxr or some of the other tools listed at /compo/tools/. You can make interesting things in less time than you might expect...