Unless you have plans in the future for actually using "ice" in the production of something, you should get rid of the Water Freezer. There isn't anything you can do with ice, except to melt it back into water. And each building takes energy to use. So as of right now it's rather pointless.
Game is coming along great. I like all the additions you've made so far. Keep up the great work!!!
Suggestion: Research bonus - Energy conservation -5% energy usage of all buildings per level (will use a lot of research and xincrease per level)
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You will need ice further in the game, and in the future there will be other things requiring ice