This was dumped from an EPROM cart. It differs from every retail dump I could find. Notable is that the title music starts at the title screen instead of the publisher screen, and the music often doesn't restart properly after the player dying in a level.
Cool, I'll have to try it out some more to see what all is different! Looks like someone on YT pointed out that the ostrich segment is unbeatable here.
I added this and your other prototypes to Hidden Palace for safe keeping. The label on the EPROMs is pretty interesting. Looks like someone wrote dip switch settings. Those aren't usually written down for prototypes I think...
That was me. There was no label on that cart, I added it. The one on Super Baseball (see other thread) is original to the cart when I got it.