The freezing tiles sounds like an interesting concept hmmmm 👀
It would be even more challenging if you have to break them with clicks, because you could accidentally reveal tiles when you might want to flag em or use the sonar on them.
We could actually have both things tbh, like,, it takes a long time to melt, but if you feel like speedrunning you could go ice breakers with it and risk it. Maybe the twist with trying to be quick is that the amount of clicks it takes to get rid of it varies
