Fun but very difficult, couldn't make it very far. Like most commenters below, I think this game would benefit alot more with clearer instructions. I am still not sure what the grinning teeth on the bottom left does.
Love the gura sprite! But the level of detail is a little contrasting with the other graphical elements, would like to see the same for the blocks and spikes, maybe give it a little more underwater theme as well (corals for spikes etc).