Hello thanks for playing and for the feedback! If the Ice is still remaining even after the duration it was supposed to last then its most likely a bug which was present in this v1.1. I saw that you said you preferes the version on this site (v1.1) more than the experimental (v1.4), could you elaborate on that thought so I can better understand why you like the earlier version more?
The experimental version is a lot harder, and I actually don't usually complete the whole tree because some of the upgrades I wouldn't use, like the plant one where I flower ponds? I think it is that but I forgot. and if I don't unlock them then I will have a better chance of getting the ones I want, (I like immolate and regeneration the most). Also, this version, it is more fun because I can go to like round 730 :) that was my high score before I had to restart my computer :( Maybe you can add a save option? Like a unique code for each game and you can save that in the menu option or something? Also the beavers in the experimental version make It really hard because they take so much of my max health and I have to defeat almost all of them every round, but like for the squirrels, I can let them leave the screen if my regeneration is upgraded enough, then their acorns won't do much.