Hey! I'm here from octopus. I didn't finish the game. I have thoughts.
Good stuff!
I like how standing on the floating pieces of wood makes them sink a bit and am definitely a fan of the puzzly system you have here, of placing blocks in rushing water to use them as a bridge.
Holding a piece of wood above my head has a really neat feeling to it, I think because these sorts of games don't often have vertically stacked layers? That I've seen? It makes the world feel distinctly 'not flat'.
Bad stuff!
It all gets a little too repetitive and slow for me, and it does it really really fast! Walking over the same bridge with no chance of error and no opportunity for expression gets pretty dull after 10 times. This is the reason I did not finish the game.
Also, you gotta credit the musician, assuming you got his music from the same place I did & it had the same license!
Personal hangups:
A big problem I've had with making games like this is there's no default "fun" to moving around. Consider a platformer by constrast: Walking across a flat piece of land, I can jump whenever I want without interrupting my movement towards wherever I'm going. With a game like this, walking across a flat piece of land has no vectors of expression. The plainest platformer just has more "play" than the plainest grid-based-movement game, and in this game there is a pretty strong current (ha ha! a pun) of performing pretty repetitive, pretty slow tasks.
There's pretty much no chance for interesting failure, incidental expression, critical success, or any kind of surprise, along the way from a piece of wood to the end of my bridge.