Variable countdown timers for Radiation and Slowfreeze have now been added!
The value is set in the Editor, in the Pieces tab, when clicking on one of the objects. There is a maximum value of 99 seconds and a minimum value of 1 second, with the default value set to 10 seconds.
If for some reason a level contains one of these objects and a countdown timer has not been set, or has a 0 value, the player will default the countdown to 10 seconds.
This will feature in SLX 2.5, along with (hopefully) an improved animation for each...
Player support in Commit 34d43cda1.
Editor support in Commit 5a0e4ee.