First of all thankyou so much for playing the game!
I will answer to your feedback (spoiler: I agree with everything)
1 - There are two reasons why I choose the solo approach.
The first one is that I'm working on other projects at the same time so my schedule is unpredictable, this means that I couldn't guarantee that I would complete the required tasks on time.
The second one is that is my first game jam, so I was looking for a challenge while trying to understand how these events work (also building a "portfolio" in order to find a team next time)
2 - Unreal is the only engine that I know. I'm pretty good with it and I can basically do everything in terms of gameplay but... I'm definetely not an artist. I have good eye for beautiful stuff but I have not the skills to make that on my own.
Everything from the start was designed to work even with "bad" mesh and "wrong" colors (I know the UI isn't good but I didn't have time to study a color palette)
Basically I am a Game Designer and a Blueprint UE Programmer so not the most appealing teammate for a game jam...
The next time I will definitely look for someone else to collaborate with. Perhaps with you! (if you want)