Very nice and polished game! Really great mechanic, reminds me a bit of tricky towers but with your own twist. Was really fun. I was able to glitch myself into winning by spamming ^, but it was still really fun to play, good job!
I couldn't get it to work in the other levels, but what I meant was, that if you spam up really fast, you can place multiple blocks while going up, and this for some reason sometimes causes you to win, even though you never had a continuous connection to the finish line.