Hey there Kas! No as of now I do not plan on doing any commissions.
Hey there Riku!
Yes, you can use these tilesets for a commercial game as long as you are giving me proper credit, by that I don't mean money, you just have to mention the name somewhere, haha
Also, yes I am indeed planning on releasing an interior tileset soon!
Oh, I actually recommend my other tileset if you are working on a serious project!
The thing is, that one is more complete, versatile and better as I made it after this one, sure if you want high resolution sprites, this one is the only only option for now, but soon...
Also, best wishes for your fangame!! :)
Hey there seli!
I am actually simultaneously working on 3 different tilesets, they will be released shortly!
Also, I would love to work on a cave and graveyard tileset! Definitely in my to do list! :)
You can use this tileset in pretty much any RPG maker as long as you are resizing it, for example in RPG maker xp, the engine is 32x32, then all you need to do is open this tileset in an image editing software and then double it's size, :)