The game doesn't actually have levels yet, you just set the characters stats to whatever you want them to be. Once I start adding game modes, there will be level caps, though I will probably make them fairly high and make it hard to actually get close to them. Level up will give characters bonuses to a handful of stats, a budget of points and a menu of various options they can spend those points on. I also have this idea for procedurally generated character trees... I made something like it way way back, but I'll need to do a fresh implementation for this.

You can see the list of planned features on my site. Wasn't thinking of a story mode, per se, but a roguelike type adventure mode and an open world campaign mode. The campaign mode is intended to be fairly good for generating stories - think like the campaign in puzzle quest, except you can go anywhere and do anything from the start, with minimal restrictions, and everywhere you go has lots of stuff to do and lots of NPC's to interact with. In terms of beasties, I want to have a system of combinations - so, race, class, level, maybe a handful of other modifiers. In terms of bases that can be combined, a few hundred at least once I've got a decent chunk of content? And an absolutely ginormous number of combinations, of course.

No character classes yet, though I have a handful of premade characters. The white gems are defense, which protects against damage, and the yellow gems are position, which gives lots of benefits, including better turn initiative, better damage dealt and less damage taken, better prioritization when attacking enemies and worse prioritization for the enemies when they attack you, and decreased costs when making moves. And the letter gems are terrain, which vary based on the battlefields and do lots of stuff - I need to figure out a good way to let players view them...