It's a nice game. I had fun playing it and the AI(?) not turning out to be evil is a welcome surprise.
But nearing the end you hardly have any idea what's going on, suddenly exploding without any idea why, the upgrade you most need, more light, is not available. Adding to that, thanks to the many colorful resources, you only notice lava once it already surrounds it and because it builds more blocks (I think? again the light issue), you're likely already out of ammo and sawblades don't do much at that stage you can't escape it.
It lacks regular damage upgrades so you have to use your 8x multiplier on base damage to get anywhere.
So.. it's quite fun, but it would need more upgrades for light, base damage, sawblade damage, max energy, perhaps ammo-over-tome and maybe a minimap or a pointer towards the nearest base. Basically, upgrades to make your earlier unlocks not useless later in the game. In turn I'd scrap or extremely buff the collector upgrade as it's pretty useless right now.