I really enjoy the game, and I'm looking forward to where it goes. I've played it a bit (and wandered around the lake a little), but I did run into some frustrations. It took me a while to figure out how to move the blocks because they didn't always move - and then suddenly they would. I'm not 100% sure why, but it seems like if I walk all the way up to a block where I've touched it, it has a good chance of not moving when I click the mouse, despite there being the arrow showing me I can. I tend to have to back up and try again or walk away and come back or just not get too close to it. Even that doesn't make it work all the time. I wish I could offer more, but that's my only issue with this otherwise excellent game.
It's a good start to figure it out. I have some idea, so I try to reproduce the bug. Thank you for the feedback! :)
May that can help if you tell me, this bug appeared for you on the 1st or at the 2nd level too?
A couple more things I noticed. Sometimes when moving the block didn't work, it seemed to shudder a little, like it was stuck. And sometimes when it didn't move, if I then tried to move forward, the block would then move. Perhaps because I had moved... Best of luck with your game!