Simple mechanics, challenging obstacles. The extra health and lives got used, no question there. It's tough partly because the tight spaces needed precise movements and partly because I can't see where I'm going. It's kinda hard to think with portals-- er, I mean with gravity -- when I can't see very far ahead. Both the tight gaps and tight screen also got frustrating if I pinned a box to a wall, but that's on me.
The music feels nice and flowy, the jumping yell got dull really fast, and the graphics remind me of Mega Man. On balance, that's a plus.
Overall, okay and worth some relaxation time.