I like several things about the game, the aesthetics, the concept of automating everything, the challenge in thinking and planning building ahead so that you wont have to remake the same thing 50 times, something you dont exactly do on a daily basis. i'ts quite similar to programming in that sense that you have to think ahead about expandability.
The game features 7 'ages', at the end of which you reach nuclear power and begin to dive into aluminum crafting that allows the creation of improved machines. And while the end game isnt defined entirely, as one can expect from an early access game, there is (imo) plenty to enjoy especially with the free multiplayer, with new ages planned (age 8 is open but empty).
Also, the company seems to be working constantly on adding and fixing new stuff and listening to the community, as can be seen in the "experimental" version of the game, that is essentially like 3 updates ahead.