Sorry if I'm repeating anything somekne has told you.
Alright so pretty similar to my first tank when I first got my snake. First thing that popped out it the open sides. Cover the left and right sides just like you did with the back. Adds more "security". The stick on thermometer is not really a good one. A digital one which reads both temp and humidity is more accurate. One with probes is more suitable, that way you can measure the temp directly over the hot spot. You would also want to place it basically as low to the substrate as you can. The halfogs are no good, a tight fitting hide with a small entrance is best, one for the hot side and one for the cool side.
I mentioned the mulch already, I used aspen too at first. By now you either have or are aware you need to have any heat source on a thermostat. There is a sticky thread on setting up tanks. The sphagnum moss, damp towel on the screen, and misting daily will help your humidity problems.
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