I just bought a science for $114, but it cost me almost all my income and gave me 2. That detected “double click” cost me HUGE. I’m switching the mouse I use just for this game now but if there is any way to undo purchases before they go “live” that would be amazing. If I had $19 less (and was unable to buy that 2nd science) I’d be so much further ahead!
An undo feature would also make planning easier. For example:
Research will be done in 18 hours… lets see if I buy 2 more science if it will complete before the end of the cycle. Nope? Undo.
Its possible to look at the numbers and math it out but this would make it easier, especially from a phone.