Yeah I found the other one :)

Got to level 100! Managed to get the Jumbotron to lvl -1, but it still acted like a normal lvl 1 Jumbotron. After you get around ~6 of any upgrade, it becomes unable to appear on the lvl up menu until you exhaust all the possible options. At that point, any upgrade (except for Walk Off Homer) can show up randomly in the 3rd slot (including double cleats). I only got around ~3 Cleats upgrades because I find it hard to control the character when he moves too fast.
I wish there were hints for some of the hidden signs, or at least indications on how to get them. Often while trying to get hidden signs I have not yet found, the solution was hidden blocks with little indication. However, despite those few hidden signs, the mechanic is usually done well. Good job overall.👍
My personal guide:
Turn 1: Get Skateboarder, Blacksmith, or the 5 costs, if none are available then die.
Turn 2: Still buy available 5 costs unless you need money for Skateboarder or Blacksmith
Turn 3/4: If you have Assassin in shop and have money; then get him. If not continue turn 2
Turn 5: You should have Skateboarder/Blacksmith, Blacksmith/Assassin and Chef/Guitarist. If you have available capital then get Boxer.
Turns 6-8: Make sure you have Skateboarder, Blacksmith, Assassin, and Boxer.
Turn 9: PRAY
Turn 10: Get Bodybuilder
Turns 11-14: Wait
Turn 15: Get Bouncer (Edit: Instead, replace Boxer and Blacksmith with Guitarist, Goon, and Mall Cop).
Turns 16-???: Wait for inevitable death
Thank you for reading my guide.