Taken from my stream. Levels 1-4, currently the only levels in the game. I didn't put any Deliciousness on any of my breads, just tried to get to the toasting locations. If you're having trouble with the climbing mechanics, try covering yourself with jam. You'll be able to stick to walls very well. If you're on a wall and running out of grip, simply push up against the wall. The jam will drastically slow your descent down the wall and your grip will recharge.
Level 1: Toaster. The toaster is surprisingly difficult to actually slot yourself into unless you know how to very subtly shift your position.
Level 2: Room heater. I did the room heater instead of the TV because the path to the room heater is more challenging, and toasting it evenly on the heater is more difficult.
Level 3: Clothing iron. I passed right by the curling iron, which you can also heat yourself up on, but the clothing iron is more fun to try to toast yourself on.
Level 4: Hair dryer. I could have gone for the radiator which was right next to the table, but I was running low on edibility and wanted to make sure I won. The hair dryer is pretty satisfying to toast yourself on anyway.