This is an early quick and dirty concept for the arena death screen. It doesn't look anything special here, but what I have in mind may be even better than TCOD's flaming skull... I cant' say more for now, I might know more about its feasibility tonight. This picture was just a test to see if could look good enough on a 80x50 resolution. The image has been scaled up 3 times here.
Concerning libtcod 1.3, the mouse support has already been added. Early adopters can find it here (sorry, only mingw32 version before the final release) :
It's a work-in-progress version, so anything could still change until the final release. Especially the wheel_up / wheel_down flags that don't seem to work.