Drew up some T0 rockets, and reworked the colors for torch-ships.
If I could will this game into existence, it would feature dwarf fortress style persistence where each colony has it's own economy and development. T0 worlds are the most common, but getting cargo on and off them can be difficult. The players would have to contact indigenous space agencies and contract out a launch. This can be expensive, but some worlds would be willing to spend lots of money to trade with the rest of the cluster.
The HLV can put large(ish) payloads into orbit, but it's expensive compared to an SSTO or space elevator. It can also launch NERVA space tugs which can be clustered together to form crude, disposable, interplanetary craft.
The Shuttle is more versatile, able to bring cargo down to the planet's surface as well as up, but it has a smaller payload and a lesser range.
At T2, the players can use mini shuttles to transport passengers and small amounts of cargo, but nothing as big as an entire Cargo container without contracting a rocket launch.
The NERVAs are based on the original STS plan, and the HLV is based on the Nexus. Originally they were going to be launched on top of Saturn-Vs but I decided a semi-reusable single stage booster would be more economic for a society that's trying to engage in offworld trade.