Right at the end of the game, it is possible to use the pink key to open the pink lock, then go back and swap places with the gold key on the hook. This allows you to ride the final vent as the gold key! But the ending that plays shows the pink key escaping! I suggest you add a check for this, and a new, secret, second ending! What treasures will the man unlock with the gold key?!?...

Thanks for making this game, it's been fun getting stumped over puzzles that look so devilishly simple. My feedback is only limited to the early stages of the game I've played, but I've noticed part of the challenge in puzzles is fighting how sticky the controls and mechanics can be. The floaty character is fine, but in tandem with key auto attaching themselves onto hooks/being picked up, leads to a lack of control which I'd say is quite important to feel in puzzles games. Noticed especially when you want...

Which freaking key stroke returns me to the portal? I have pushed every button on my keyboard and nothing will take me back to the portal. I have to exit the whole level and come back in. I feel like a dunce. Why are there no in game instructions?