Out of all the entries I've played, this one feels the most complete!
I took a little while to figure out a couple of the puzzles, but when I did,
they delivered the "a-ha!" feeling we all crave from videogames.
I wasn't paying that much attention so forgive me if this is actually a non-issue,
but I think energy should be a renewable resource. That is, it fills up a little over time.
Maybe one point every 10 seconds or something. That way, all situations are winnable
if players miscalculate. It'll also serve to punish enough of the player's time
to encourage them to be careful. Still, the ability to replace orbs with health
in the first place is quite considerate, so thanks for that!
Good job. d(^^)
TOTAL PLAYTIME: 40 MINUTES
FINAL VERDICT: *shakes fist* LUUUUUUUUUUUUUUUUUU!