Wow this was excellent! I love the single-use dash/jump mechanics, and the resetting and time-stop portions are also excellent. It's incredibly satisfying to bounce, jump, and dash all in a chain with coin resets in between.
It felt a little tough for me to consistently perform an action right out of time-stop. For example, it felt difficult to freeze time, then choose "Jump", and then actually jump immediately afterwards (often times I would dash instead). This happened to me a lot on the "Coin Reflexes" level. know this is just my fault for being bad, but I think this is tied to the fact that the "change power" button while time is stopped is the same as the "Use power" button when time is moving.
All that said, I really like this game. It's very satisfying to play, and the levels are all crafted in a way that feels really fair and tests all aspects of the design. Great work!