This is what I use to make the Blue Slime's Adventure Demo! Nothing else to say, really.

As the title implies, this is an early test beta for an upcoming 2D Platformer RPG titled "Blue Slime's Adventure". Created entirely by NP Games, this Demo plans to include most features that will be shown in the full game (Which is NOT out yet, and won't be for a while). Huge thanks to Fluffy Taco Games, Pixel Games, many others, and numerous tutorials on YouTube for help with coding some aspects of this Demo.

Blue Slime's Adventure Beta