I love this! The music keeps me going!! I'm up to like level 24 and gonna finish it later :)
I agree with Lopar and Akira -- you can definitely polish this into something pretty popular I feel like, it's already fundamentally fun and unique! I would suggest color coding the gate types or giving players the option to "inspect" tiles for a reminder about how they work. I love how the levels teach you as you go, but it's still a lot to juggle, at least for me.