Altered tutorial, new level.

I've cleaned up the tutorial a bit, to hopefully explain the mechanics a bit better, while simultaneously getting a good way to put in messages in future levels. Speaking of which, I've put in a new level, replacing the two old ones as they were quite poorly made, to be honest. While the new level might not be top-tier, it should hopefully serve as a decent introduction to future puzzles.

I'll be sure to spend some more time planning out future levels, and in the meantime I hope you enjoy the minor content that is present. :)

- Cappon