Thank you for playing and for the feedback :)
The terrain change was on my mind but I decided not to add it and rather put the emphasis on the blocks.
The more horsepower/less weight the car has, the faster it goes, it's just that some upgrades takes a couple of turns to be activated (as indicated).
I did tried to fit a level counter on the screen but it didn't work with the UI (it just made it bigger than it should be and more invasive onto the art)
Yes, I heard of the erase launch bug and it will be fixed next update :)