Hey wwwarter:
1) the game is not finished so no ending yet
2) Height influence is already added for Alisa game and Celestria game in V0.4 ( Patreon Version)
3) V0.4 the Patreon version has a height wager increase for higher bets.
4) Again V0.4 has low quality mode that removes the weather effects that's causing the issue
5) The secret key has multiple ways to be used, returning the key isn't the real path.
6) Again Celestria's game scales with your height the bigger you are the easier it becomes, I also nerfed it in V0.4.