I like it! It's definitely my kind of game. I appreciate the extent of the tutorial: just enough to introduce the core mechanics without holding your hand longer than necessary. I suggest running everything through spellcheck :) Other than that, a couple of QoL ideas (not necessary, but could be nice):
- Resource extraction tiles show the number of nearby resources. For example on a woodcutter next to three forests, it says "6/s" and underneath "(3x2)." Then you can, at a glance, see to which level it is upgraded, and perhaps more easily decide which to upgrade to a lumbermill.
- When you want to upgrade something that takes various kinds of resource, it could be nice to see which you have enough of, and which you need more of. You can figure it out yourself of course, but it takes a second.
- Might be good to have a way to restart without refreshing the webpage