Informational effect icon

[viscid sentinel]

These icons would be easier to understand than mc ones, and you don't need to open up a menu or inventory*

[fast raft]

The timer ring could be a bit bigger, but I like the idea

[crystal wraith]

Looks pretty good, and the idea works well too

[green crown]

I like it. I agree with HollowFall, though. The timer bar should be thicker and I think also the level markers should be bigger, too.