Really fun and interesting game! I really liked the concept, good job on your first game! Also, there are a few things that I've noticed:
- The timer is a little weird, it goes like -150 sometimes
- If I dash right before I enter one of the portals, I don't seem to teleport
I've seen you address this on another comment, but it would be nice if there was a more clear visual indicator that the mines and dash are off cooldown.
Other than that, it's a really cool game! Good job!