I tried this on mobile, through F-Droid and loved the idea but thought it was too difficult to control and too involved for mobile, so I'm very glad to find it here! I love this game! Easily one of the best tower defenses I've seen. It's really more resource management and strategy at this point, and it's great!
I found it on mobile first too. I think there is room for improvements on the mobile version controls too.
Suggestions:
1. when you select the category of tiles make it auto select the first one in the category. That makes building MUCH EASIER!!
AKA- Less clicks=less time=more time to repair between waves.
2.The timing for the move option need to be adjusted or better yet just have a move button so we can move things we have already built would be better. Right now I know we can move the selected region to build, but after we can't move anything. I know that can totally ruin the game by being able to move your stuff away from enemies. However, I think if you made the move button only be able to move the last thing you built that would be perfect.
3. LOVE the directional build commands on mobile for placing blocks. The ability to change direction of build using BOTH the button and the direction of travel with your finger is great! That is an awesome feature please don't get rid of it.
4. HUGE ISSUE!!!!!: The tutorial needs some heavy improvements. Everything about it really just screams janky and I think many have uninstalled the game before finishing the tutorial.