Thanks, just tested it a bit and its very nice to have such a program!
It already works very well!

The GUI seems to be a mix of MUI and something own, I thought it would be fully native MUI!?
The cycle gadget is overlapping here with the "max. Tiles in Memory" gadget in the prefs window.
Mapparium_prefs.png

I like the name Mapparium although Mapporium would be also good;)