It's a game called 'Cave Island'
You can find the key for it in the comments of my post saying: 'This was a fantastic game'
You'll need SmileBASIC to play it.
Key: Q3KP33Q3
The file is VERY large and will take a minute or two to download.
Tip: Complete all the challenges at the training dojo as soon as possible (You get extra abilities for completing them.)
Are you still taking Boss suggestions? If you still are, I'd like to suggest this Boss. Master Skeleton (SPDEF: 1397).
It can summon Skeleton minions (SPDEF: 999), swing its sword, and stun you by screeching.
Something weird I'd like to point out. Bub is able to delete a one way sign by spiting out a Bubble on it, not sure if this is intentional or not.
BTW, I love the course creator.