I just wanted to share this one. The ROM file is available for free here:
The game is great -- very similar to "Smithereens" on the Odyssey 2 (but no voice ). I tried the game and it's a lot of fun with 2 players.
I decided to purchase a real copy of the game. Why? Because it's really affordable and that deserves to be supported. How many times have we seen a homebrew that's over $50? This one is only about $18 shipped from the Netherlands! It only comes with a ROM board and stickers -- you have to provide a cart shell. I think that's really cool if that's all it takes to keep it so affordable.
Credit where credit is due -- I discovered all this from this John Hancock video: