There's no comment section enabled but I wanted to drop by to say this is one of the coolest game concepts I've seen. The Postage stat feels a little tricky in places ($150 for an upgrade is a lot,) but the letter to the GM and the game being mailable and lots of other little design flourishes are cool as heck.

If you're just skimming the page and you're reading this, buy this game.

Hi! Thanks! So glad you're enjoying this game. :)

I admittedly did not get a chance to playtest some of the later-game features, so I'm definitely not opposed to revamping some of those with more feedback. I wanted to make getting that upgrade challenging, but definitely don't want it to be impossible!

150 Postage definitely isn't impossible, especially with upgraded envelopes and expedited shipping, it's more that it runs on the "premium currency" which might make it difficult for folks to get to that level of gameplay.

Ultimately, if the goal is to increase spending on usps postage, everything is kind of working as intended and this isn't necessarily a problem.  But free-to-play options to accumulate Postage would make the higher level upgrades more reachable and let people budget a bit more while still seeing all the content.