The new keyboard shortcuts are a very great game changer but they can get a bit to crazy because one time i was doing a project with MORE than six screens. When I saw a useless screen, I pressed the backspace( or delete) button to delete it but it did not work so i continued to press it but it did not work. Finally after a billion centuries, it deleted but not just that .Yep, it deleted my whole project. If you think that was weird (weird cause who would keep on holding instead of waiting), when i was renaming my buttons and i spelled something wrong, I pressed backspace but it just deleted TWO buttons.If there was a redo/undo button, I wouldn’t even by typing any letters here.
Hi biresh.patelfxhp8s, welcome to Thunkable! 
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Undo/redo is a feature we have released recently.