A good game. It really challenged me. It looks like one of the levels will require hours of thought. That's where I stopped.
In the full version of the game, you'll definitely need the tutorial. In the full version of the game, I recommend adding a huge number of simple levels.
I don't want a button click that creates or removes an obstacle. And buttons that block the board aren't very good either. The character prevents you from placing obstacles easily.
The game would be better if you removed the timer.
Otherwise, I agree with knoxy_.
