@ Slvynn, here is an updated list of button requests. Most of them are for the improved Ixian vehicle design.
a. Feedback from last time, the "sentry" button is brown rather than yellow.
b. New bonus: Ixian Weaponry, replaces Thinking Machines (perhaps a graphic of crossed rifles?)
c. New unitcombat: Walker (perhaps a recolor of one of the walker unit buttons?)
d. New promotions: Ixian (perhaps a recolor of the vehicle unitcombat, or the "tank" part of the armor piercing rounds promo), Sensor Array (a radar receiver?), Self Repair (a combination of the "red cross" and the vehicle somehow?) Point Defense (a small short range missile launcher, or a "chaff" picture?), Adaptive (a brain?).
e. Builds: I like the new yellow theme for the action buttons you have done, so I would like to suggest replacing all the build buttons. For some, such as "cottage", it could be simply a recolor of the vanilla button, but new artwork would be fine too. For example, you had new art for the "build city' button. Here is a list: mine (3 levels, perhaps using one pick, two picks, and three picks), dew collector, spice harvester, insect farm, solar farm, wind turbine (3 levels), desalinate, plantation, cottage, fort, windtrap (nice art but does not match color scheme), well (3 levels), ice extractor