So couple of things, I had the same issues with the game freezing on the browser version, but the Windows version didn't give me that issue. The Windows version was actually very stable, but it did contain a fairly major graphical bug that basically stripped back all of the museum decoration and just replaced it with gray for most areas.
Arrow keys (specifically the right arrow key) do not actually work in either version. That said, wasd worked perfectly. I thought the areas were distinct enough, and the variety of objects was cool.
The wash basin upgrade is perhaps a little too useful. It cleaned up to 3 items each hook, incentivizing shorter individual runs so I could go back to the museum with 8 fully cleaned items and just place them. It may be harder to code, but perhaps the basin could give like a 5% head start on the restorations per level instead, enough to still make it worth it to buy, but not so much that mid-late game its possible to just come back with a boat of fully restored items and skip the restoration mechanic entirely.
Fun way to spend Saturday Morning