I forgot to mention my gripes that have to do with the demo...! First of all, in the castle, if you run, with the cape, jump on to the next platform with your momentum still there and jump again, you can get across that large pit after the secret door (which I got before I beat the castle...). While this normally isn't a problem because you can just fall into the pit you jumped across, when you go onto the cement blocks, only a reset will save you. Beating the Switch Oasis doesn't mean that you get to save(!) which means if you beat it after having beaten the castle both ways, you'll have to lose that. Also, I think, in Monty's Domain, you should have coins under the invisble POW blocks because the secret exit is practically impossible to find otherwise. I'll make a review eventually....
Thanks for pointing those out. I'll fix the first one, even though I don't know how... Is there anything I can use to prevent the player from going on after the door?
However, I didn't quite understand your second find... could you show screenshots or something? :/
Also, I found another bug myself. If you get the secret exit in Monty's Domain before the normal one, you'll be able to access Cape Caverns as well. That's because I checked "Enable Up". I won't release another version just because of that though. I think the next demo should be out soon enough.