Huge milestone: first actual level!
I was scared of this moment. What if the game just doesn't work? What if the puzzle design just is not interesting?
It took a while to design a reasonably interesting level, but I think I got something nice.
My dude can push multiple boxes at once, jump over 1 obstacle at a time (as long as the destination space is free), swim in water and chop up bushes. If he is in water, he cannot jump nor push boxes.

What's next? I need to finalize game mechanics to actually finally implement the sacrifice idea. I need to design a lot of levels. Some story would be nice, let's see how far can I get with it. Sound design will wait till tomorrow. I don't know whether generate synthetic sound or record my own. Synthetic sound fits the art style more, but recording sounds is so much more fun.
And maybe, I will even have enough time to animate stuff, that would be nice.