Nice Idle game, it has a surprising amount of content and the overall progression feels pretty good.
A few small gripes:
I wish the bonus was hammers earned rather than owned. It's very easy to click a shop item twice or otherwise miscalculate and torpedo your bonus. Also frustrating having to decide between the hammer bonus and buying something.
UI could use a little work, some elements could go into smaller side or top bars, to free up space in the main pane for clicking (without having to hide the whole UI). when buying something you can't see how much of that resource you have total.
Overall pretty good though, look forward to seeing updates.