I'd found 1 problem in this game, the game is too much easy, it would be better with money.
I'd read the comments below and there are very good ideas but I would like to say 3 more:
- Decoration/accessories: fences, snow cannon, hospital, heliport, parking, streetlight, ski school, shops, ski pass office, hangar, hotel...
- Nordic ski traks
-(In a far update)Day/night cicle were in the night you could repare the trails with vehicles (that you had bought) and you could have iluminated trails for night skiing. 15 minutes day, 5 minutes night.