New to leopard geckos need help

[fuzzhc]

Hello all! I got my girlfriend a leopard gecko for her birthday and all has been fine so far (I think). I just have a couple of questions: the enclosure she came with is a small exo terra tall glass enclosure, if this was to be turned on its side to give more length would it still have enough air flow with the screen being at the side and vents at the front?

Also she is looking quite a bit darker but the temperature on the hot side is reading 102f with a temp gun. Could it be down to stress of a new home?

Last but not least she has only eaten one locust in the past week. Should I be worried as of yet?

Thanks,

Andy