This is a really fun interpretation of the theme, and it's really great seeing other Unreal games! I love the sounds you chose, falling in the water sounds awesome and I didn't expect Steven to yell at me. This game has a lot of charm.
My first couple quotas were really difficult, all combine items and I had a hard time remembering what objects I need to combine into what and where to get them. There was a lot of running around and I timed out multiple times. Once I got the hang of it though it was no big deal. It's also intuitive to interact with the door afterwards, but it's not obvious. I would suggest trying to guide the player to it after they successfully fill the quota.
Awesome job!