Overall a reasonable game, albeit a little frustrating. Character animations are good, although I believe the character is just a stock asset. Perhaps some more detailing on the blocks, and a bit more vibrant colour scheme.
Level 2 was by far the most frustrating, although level 5 was a contender. The slow motion of the platforms made each level feel excessively long, and really ruined the momentum. Level 6 was great to play - loved the increased pace. Potentially allow the ice blocks to respawn after a set time to prevent soft fail scenarios. Theres a weird bug I noticed on Level 6 where you acheive a double jump if you jump off the end of the platform, but only applies to the fixed platforms. Please never have platforms that limit jump height - I know other games use them but in my opinion they are the worst invention since American toilet stalls. On average the levels were well thought out and gradually introduced the new features.
The delayed movement of the screen probably smooths thing out, but makes planning your next move quite difficult, especially in fast paced environments - also if you fall you cannot see anything.
I would prefer a bit more celebration when it was finished - not entirely sure it was worth the hour of life I will never get back (I'm not great at platformers). Well done though, reminds me of some work by a Lithuanian engineer I went to uni with.