There are a few ways to play the game: Mouse and keyboard - you can also just use the arrow keys (or configure it to WASD) and the mouse, all the other actions are tied to the mouse buttons and the scroll wheel, or configure keys to your liking...

Does anyone know how to get a particular heart on Kitty Island? I have 9/10 hearts, and the location of the last one is where Herbert's house is, but I have no way to access it.

I've got 96% but can't get it to a 100% because I am missing 2 locations and can't find them. I can't find the one under real chaintower island and one over real kitty island. Also for some reason I didn't find a single coin from Heartguy's mansion, is it a tricky coin? I searched all the mansion's portals a few times but couldn't find it....

The bug occured in Cylopia when I entered to the lab of Alfonse the 3rd via air duct at the waste yard. Instead of getting in the main lobby Kittey was transferred to the key room with rolling ball boss and when I try to leave from the only door in the room it puts me back to the same spot and I'm currently stuck in an endless loop. This wasn't the only time this occurred as in Kittey Island the door inside Glasses' lab transferred Kittey nearby the duck level instead of outside Glasses' lab. This was fix...

So glad to see another one of your games will be gracing the aisles of the steam store. Best of luck with release!