An innovative and interesting exploration game. The play area is very large, with many branching and reconverging paths. The world is chock-full of small, clever puzzles to solve.
The ice beam has some neat and original uses.
The graphics are mostly bare-bones, but there are some nice touches: I really like the parallax scrolling backgrounds.
Suggestions for improvement:
1. Such a large play area really needs a map.
2. The character speed seems a bit excessive. The environment appears to fly by. The character moves faster than its own fireball! :)
3. The green obelisks do not immediately read as a hazard (although we find out soon enough).
4. The player should not respawn with just 1 health. If you're reluctant to respawn the player with full health, maybe 3 (the original max) would be a good number.