I've played Hollow Forest until the part where you are looking for some keys. After that, I watched Lunaria's stream to see the full quest. The final bit looked really good, so I'd say this quest has a worthy finale. This quest matches it's theme perfectly. I think most "issues" have been said already.
The fact that this quest has a working large room script is overshadowed by the many things this quest does. There's the whole darkness/rot feature and there's the abundance of water which all make it hard to enjoy the platforming. Basically what I'm saying here is: Re-use the script and make another platformer that has no darkness please! I'd love to play something like this again, but less frustrating.
About Grinding Mushroom, I don't have much to say about it. It is not bad, but not as good as your other projects. It's still good to have another fairly solid quest in this contest.
Edited by Avataro, 23 January 2017 - 03:17 PM.