This is an interesting game.  It's cool that you experimented with your own engine.  I like how you used the jam limitations to make something unique.  The lack of a goal kinda makes this more of an experience then a game.

I'll echo what others have said; this is a really fascinating prototype. I think you could make something of this for sure!

Bit weird to have started in the corner. It was enjoyable, some kind of goal would have been nice though!

This is more of a fun and interactive auditory art experiment, the colours and sounds are pleasing, and the emergent pixel patterns are hypnotic. Fascinating!

Excellent audio integration. The gaming flow its crazy haha. I love it.

I love the music in this!

Very pleasing to the eye and ears.

I never get sick of FM. I'd say your engine was a success. 

I wish you added a score for the game jam, but I'll just wait and see what you do with the engine in the future.