Pretty cool, but could use some improvements
Personally I find that the fact that you were able to make this game at all impressive, let alone make it only 2mb. With that said I've got some thoughts on the game.
Pros- (Overall it's amazing, but I'm just listing specifics) I like these kinds of games so It appealed to me (very reminiscent of the shadow of the colossus story). The environments were really beautiful and varied. Overall I just like the way it's a constant flow from area to area so it feels like you're actually traveling the land.
BTW, I especially liked the god of sacrifice, it seemed to add more depth to the story.
Cons- 1)Graphics are somewhat grainy
2)when you use the boost rings the camera can get way too close and make it hard to see where you're going.
3)There's not much of a story, maybe give a background to the main character and the world you're in
4)The boss fights were pretty boring (need more variety)
5)When you move from environment to environment it sometimes randomly jumps instead of a smooth transition (it's not a big deal, but it's still something to consider)