N.B. at this time, this is a VERY short game, and clearly very WIP. It really should be marked as such in the description fields to make this clearer. A public source control repo should really be setup, and that field filled in on CDB, so players can follow along with development.
This game seems very focused on a core concept of crafting ever more complex things by combining simple items, like Little Alchemy. At least, this seems like the safest assumption since it's by far the most fleshed-out gameplay area. The idea of having a single simple crafting system that everything is built through over multiple stages is interesting and seems like it could lend itself well to continuous progression.
It feels like this game needs a list of goals, or a progress indicator or something, since there aren't a lot of elements that naturally generate and it's hard to tell whether you've reached the end of the game so far or not. Also, constraining the crafting system (limiting size/shape or number of ingredients) could make the crafting a little easier, which would balance out well if it's intended to have a huge number of items and recipes.
The only issues I've found with what content there is so far, other than the total length, are the texture for the copper ingot, and the fact that water is completely opaque but intangible so you can fall to the bottom of the ocean and be trapped/lost indefinitely. I hope to see this game continue to coalesce around a strong core idea, and continue to improve the execution.