Now that the rating period is over, I've uploaded a new version, containing 24 bug fixes and new features in response to community feedback.
I have not (yet) implemented jump buffering, but I did tweak the colliders on the spiked plates. The cooldown time for all abilities has been reduced, with a handy visual indicator to let you know when the ability is ready to use again.
Feel free to check it out, and thank you again for sharing your feedback!