Thanks for playing ;)
Ideally you cary as many packages at one time to maximize your score. 4x the points for pickup and delivery when you have 4 packages, 3x when you have 3, etc.
I was going to tie the score into the end condition. Finish the game with 2000+, ending 1 town is saved, 1900+ Steve is saved, 1900- better luck next time, but ran out of time to add it into the game in a way it made sense to the player (it seemed a bit punitive for such a casual game)
Concerning performance, unfortunately web support for the engine is still experimental on itch. Their header restrictions won’t allow for shared memory array buffers, which are needed for threaded wasm. For example, it was pegged 60 in Chrome on my venerable t420 (windows, 2nd gen i5), but chuggs in Firefox on my 2020 XPS (Linux, 10th gen i7). This is why I also uploaded a build for each major OS.
Which system (cpu, browser, is) did you play on? Pressing 1 toggles the display of the in game fps in the bottom right corner.