In version 1.3.5...
- The game locks me out of my access to the sea-shroom.
- The UI in the level selection screen is glitched. The example I could find is that the weather levels are using the sun instead of the cloud as its symbol.
So, when I intially beat the boss level in the pool section, I did remember acquiring a sea-shroom in the end.
But for some reason, when I looked at my seed selection screen in the latest version, it appears to be locked...
I thought that perhaps, beating the same level would fix the problem. So, I tried again, and I still didn't get the plant.