Thank you very much for the feedback! You're totally right! I didn't even think about QE xD
I implemented the engine first and liked E+R for start and stop and intuitively went for this on the steering as well - but thats crap now that i think about it! ;)
About the Upgrades beeing cheaper you're right as well. Didn't think much about it beeing a "show game" - I'm not realy experienced with this. Thanks a lot for the tip, gonne keep that in mind next time!
What do you think about further development plans?
I realised i went away from steampunkt and leaned more to a space game in the end. What would you think about the game beeing transformed into a spaceship game in outer space. Closing up the ship and making an airlock maybe. Maybe make a real ship vehicle controller.