Icosahedron 3 is broken too. At level 3, I went 2000+ clicks without gaining a single TP. There should be about a 1/400 chance of this happening for a 2000 click run.
When I use the zoom feature in Firefox, which is necessary for me to see the entire game window, there are some issues with the clicking regions. For example, the All tab in the inventory window overlaps with the help and close buttons and is difficult to click for certain zoom settings.
Sorry for the late answer, I didn't see your comment earlier.
Sadly, there's not so much I can do about this issue since the game wasn't really made to work on low resolutions.
I'll try to upload a non-browser version that will let you play in fullscreen with any resolution.
[Edit] Here it is: http://beldarak.be/en/sorcerer.php
 "Geometry Idle"){kind=icon}
 "Myrne: The Sorcerer"){kind=icon}
It does work but the chance is too low, will be updated soon.