Over the past few days, Roblox forced a update that made old physics games in experimental mode. This mode allows users to only be enabled to players who haven't had experience with Roblox studio. There is one disadvantage to the cause. Your account has to be 13+ of age, and must be friends with the creator of the game or group. This makes wall flinging completely unviable.
https://devforum.roblox.com/t/further-changes-to-playing-ability-of-experimental-mode-games/149836
Current games with Experimental Mode: Roblox Adeventure II: https://www.roblox.com/games/280782/Roblox-Adventure-II Paper Roblox 2: Beyond the fold: https://www.roblox.com/games/1921766/Paper-Roblox-2-Beyond-the-Fold Roblox: Teamwork Obby: https://www.roblox.com/games/182730/Teamwork-Obby-3-V7 Who Killed Peter Griffin: https://www.roblox.com/games/2074109/Whos-killed-Peter-Griffen-REVAMPED Roblox Quest: The Evil Robloxian: https://www.roblox.com/games/3458801/Roblox-Quest-1-The-Evil-Robloxian Roblox Quest: Quest to the Guest https://www.roblox.com/games/4709180/A-ROBLOX-Quest-Quest-to-the-Guest Undead Nation: https://www.roblox.com/games/4723932/Undead-Nation Roblox: Ocarina of Time: https://www.roblox.com/games/5071780/LoZ-OoT-Young-Link-Legend-of-Zelda-Ocarina-of-Time Climb 2000 Stairs to Vip: https://www.roblox.com/games/5229119/Climb-2000-Stairs-to-VIP Roblox: Mario Adventure Obby: https://www.roblox.com/games/6511498/Mario-Adventure-Obby Roblox: Zelda Obby: https://www.roblox.com/games/6396466/The-Obby-Of-Zelda-Original-VERY-HARD Roblox: Who Killed Mario? https://www.roblox.com/games/7219394/Who-Killed-Mario-Thanks-for-30k Roblox: Wipeout Obby: https://www.roblox.com/games/8274990/WipeOut-Obby-I-V1-4-1 Roblox Quest 2: Distorted Dimensions: https://www.roblox.com/games/15071555/Roblox-Quest-2-Distorted-Dimensions A Roblox Quest: Bloxxy-Tooie https://www.roblox.com/games/15072543/A-ROBLOX-Quest-Bloxxy-Tooie A Roblox Quest: Elements of Robloxia https://www.roblox.com/games/16465119/A-ROBLOX-Quest-Elements-of-Robloxia LegoBlock Adventure 4: Rise of the Shadows: https://www.roblox.com/games/24202144/Legoblock-Adventure-4-Rise-of-Shadows Roblox Mirror Edge: Shadow of November: https://www.roblox.com/games/25407391/Shadows-of-November Roblox: My Little Pony: Friendship is magic obby: https://www.roblox.com/games/29228126/My-Little-Pony-Friendship-is-Magic-Obby-SO-HOT Longest obby in Roblox 1000: https://www.roblox.com/games/36795057/Longest-Obby-in-Roblox-1000-Obstacles-Hangout Silence: https://www.roblox.com/games/48508564/Silence Roblox Adventure: The Rise of Nobessi: https://www.roblox.com/games/275434/Roblox-Adventure-The-Rise-of-Nobeesi Roblox: Escape the IPhone 5 https://www.roblox.com/games/246798759/Escape-The-iPhone-5-Obby Suepr Monkey Ball: https://www.roblox.com/games/110505213/Super-Monkey-Ball A Lucid Dream: https://www.roblox.com/games/154819612/A-Lucid-Dream Bitventure: Wrath of Elatha: https://www.roblox.com/games/168000112/Bitventure-Wrath-Of-Elatha The Check Point Factory: https://www.roblox.com/games/176162751/THE-CHECK-POINT-FACTORY Roblox: Sonic Ultimate RPG: https://www.roblox.com/games/180037022/Sonic-Ultimate-RPG The Adventure Rush: https://www.roblox.com/games/190641677/The-Adventure-Rush Speedrun Ultimate: https://www.roblox.com/games/190873758/Speed-Run-Ultimate-2-NEW-STAGES
Hopefully in the upcoming weeks roblox will possibly fix the changes behind experimental mode. This post will be updated if games aren't in that mode.
