I'm really glad you enjoyed the game! I had fun making the mechanics of the game so it makes me really happy to see that you found them engaging. By cancelling an action I assume you mean something like an undo button. Unfortunately, you are right that the game currently doesn't support undoing played cards, which I understand how that can be annoying. I've definitely misclicked my fair share of times during testing as well 😅 I'm currently thinking of maybe adding some small quality of life improvements to the game, now that I've received some feedback from various people. I'll add undoing a played card on the list of those quality of life improvements :)
And just to clarify, I started making the game for GameDev.tv 2023 but since I couldn't finish it in time, I didn't submit it.