Ok. First, there was no way the crickets got out, so he had to have eaten them. He's surprisingly pretty fast, at least faster than I would've thought. And they aren't hiding under anything in there, so... I dunno. Maybe they evaporated lol.
Second, I did try earthworms. I put two in there and I'm pretty sure he ate them because when I changed him into another tank I couldn't find the little buggers. I dug through his dirt and everything.
He is in a 30 gal aquarium for now, he's only about 2 inches long, so I think it'll be ok for now. I did my home work and I know glass isn't the best thing for them because they can see out and blah blah blah. So I actually did try to set up my enclosure in the best less stressful way possible.
He has soily-sandish dirt as the substrate, about 2.5 inches. Then there is leaf litter on top. I just planted some spider plants in there, will be getting moss soon, and he has a wooden log hide. His water dish is plenty deep enough for him yet shallow enough for him to get out of easily. He has a screne top to filter his lighting, and I mist at least 3 times each day. I'm hoping the plants will help with that, and the moss of course.
Thanks for all the suggestions
I did do my homework on this little guy but I always welcome those who are more experienced.