Nice digger
Not being able to dig up makes strategy easier, and at the same time more thoughtful when needed
Getting resources and recipes out of order was confusing (I discovered 2 resource types before any recipe using them, and 2 recipes that need resource I've never seen. Right now I have like 5 recipes without enough resources for them), same with non-strict layering of ores (I got my first titanium in zone 3 and haven't seen any more for 30 runs afterwards)
Music is bop (it's an unlock), tho a bit repetitive (I kinda wish I could remove some songs from playlist without turning whole sound off)
Kinda wish 1st turtle also had some power (like extra light), so that switching away from it was a sidegrade, not straight up upgrade
Buildings being random unlocks is a choice. Not something I'd agree on, but it is different from other games so it's worth it (I wish there was an indication that something is unlockable)
More or less I like the game. Recommended 4+ out of 5 plus a point for some novelty