i think it took me 15-20mins. Probably less if i had read the manual right away rather then blindly using items on problems until i found what worked.
One thing you can try if you don't have a composser is ambient sounds. I just tried that concept in my jam game. I didn't use any music just rain and wind and i think it worked pretty well. It puts a little more stress on the art team, but if done with minor random weather effects it would go a long way. So like have a default happy forest sound, birds chirping, and randomly on a restart it rains with a slight effect. Then you could have a wind one with just the wind swirl, a leaf blowing left, and the character moving slightly slower right and faster left. It keeps things fresh if you are stuck on a puzzle and kinda pokes a little fun at all the in world time you are wasting on restarts.