As others have said, you did a fantastic job finding the death sound effects. Well done. Lovely music too.
The game definitely reminded me of ibb & obb too. Very nicely executed. Impressed with the polish for a solo project!
I like the difference btween Dobble and Trobble (cute names btw)'s expressions - the mouths and eyebrows. :)
I'm always on the lookout for fun new two-player co-op games, so I was happy to see this entry! Well done!