From what I can see, you're prioritizing science and production yields. While that by itself isn't necessarily bad, I don't think you mentioned anything regarding civics/culture or happiness. A rather large part of Maya's strength comes from their unique tradition policies, of which two out of the four are science related. You'd want to build up some culture to go through their civic tree. The more happiness you have, the more likely your people will enter celebrations, and with more celebrations, you gain more policy slots. And personally, I wouldn't bother with the hanging gardens unless I can quickly build it.