Rework the trains and tracks completely. Majority of the game you are driving the train, so at some points it gets really boring just pressing the w key. Someone could even buy 20 coal from the lobby and get to the end of the game while afking. driving the train should be more interactive like maybe a certain minigame where you have to time your space bar to give your train a temporary speed boost or stop it from derailing would help a lot.You could even add new biomes like a canyon where if you derail you fall in the canyon and die, or an icy biome where it is easier to derail. In the popular Roblox game fish, you have to do a mini game to catch your fish instead of just mindlessly throwing your rod. Secondly there should be multiple poi’s in your game like train stations which let you change what path to the end you are taking. You might take a path that will take you through a dangerous biome, but it would be faster be a faster way to get to the end(like a shortcut) or there could be a rack which leads you through a course of easy biomes but it would be slower because the tracks take you through an inefficient route. This would massively help the games repetitiveness problem as well because each run would be unique.