A very promising game premise combining smaller puzzle elements with the satisfaction of figuring out the best way to chain spells together for dealing damage and surviving.  The demo is an excellent proof of concept and I'll be very interested to see how it expands beyond its current state.

The only mark against it is at this time is that there is that there isn't more game to play the options menu is currently not present on the map itself (battle speed, sound, etc.).  Some might quibble at the lack of clarity on what the map icons mean while on the map (the key is on the options menu), but it's easy to enough intuit.