I guess all 32 bit users should be allowed a refund. Giving the option seems honorable. They still do have a completely working game with the current version. Just means they don't get upgrades. Also, the upgrade check logic should respect their system stats. Don't attempt to auto-update 32 bit sys...

One thing I would request, but without a useful recommendation, is to make fluid flow rate more discoverable. You can easily visualize the flow of items on a belt, you can see them, count them(in theory), and tell if its a full compression on not. Pipes are opaque. You can see the numbers on the inf...

Seeing a red train, did anyone else think that selectable train colors would be very cool? Could color code your iron train = silver, copper train = red/copper, circuit train = green, coal train = black...

Not required by any means, but could be a useful signal to the player