Not fun. I spent points on HP because I was terrified of dying and having to waste even more time on the game. As it currently stands, the game simply feels slow. Everything is a crawl -- from movement speed to attack speed to casting speed. This is reinforced by the amount of waiting in the game: boss battles and the enemies that are invulnerable until they peek up.
Overall, a practice in patience and raised blood pressure. 1 star.
I could be mistaken but I swear something's buggy about the late-game Coin Value upgrades. I was seeing my diamond count bump up in increments of ~30 every second or so, and after upgrading I was expecting it to go up to ~60, but I believe it stayed the same. Might be worth double-checking?
It annoys me to NO END that the camera shifts erratically when you're just driving in a straight line. It makes it that much harder to know whether you're: going to hit that robot or miss it; on the right side of that gate or not; drifting correctly or not.
Speaking of robots, why are some of them placed side by side? It makes it impossible to hit all of them.
You build a new farmhouse when your farmer is a full screen's length away from all other buildings - this is why the land upgrade is kept at a constant cost of 3, so you can always build new farmhouses for cheap. My strategy is to keep life low, maybe at a max of 20, so you have quick income from the farmers dying, and keep speed high, while sight is proportional to land.
Items that send your characters back at a certain percentage are crucial. Make sure you keep one on each of your players.
Suggestion for nerdook: Make a hotkey for bags of gold. Clicking back and forth for an average of four bags per floor is pretty annoying.
Also, why do the characters sometimes turn around and go back on a straight path?