Unusual concept in my opinion, but it's really fun to just try that. There are some tricky levels (btw. sorry for no audio), some are really annoying, but I think it's a fair and nice game to play for a while.
Let's talk about gimmicks:
- semi-homing attacks,
- trolly energy squares (I believe I discovered them after the video),
- giant pillars ready to smash you,
- enormous square projectiles,
- unusual, awkward trails to move on,
- teleporting containers, multiple containers - container tricks.
Difficulty is at the right place; you're going to get stuck for a while only on few levels - I like the challenge, but I also want to feel progress so that's why I like these difficulties.
There are so many new gimmicks I can't rate it negatively :D, it's creative and cleanly done. Yes, it's a simple game, but it's so well done I can imagine someone trying to pass entire game, because there's always something new.
Overall, congrats on a great game!