This game was built in Monogame using an Entity Component System engine that I've been working on (just to see if I could make one). I used Tiled as the map editor and designed the game to use objects in Tiled for spawn points of items and enemies (and to specify different enemy types). I used Aesprite and Affinity for art/graphics and music and sound files were free assets that I found.
I didn't notice the second copy of files when I posted. There are so many DLLs because I published the game as a stand-alone, so it brought in all the .NET files needed so you don't have to install anything else to play.
Thanks for the feedback!