Hey there! Nice work man, I read this is your first Jam and you did this all by yourself. You can be proud!
When I started the game and the beat dropped I was instantly bobbing my head *dududu dudu dudu* :D. After a few tries I was looking for a mute button though, not too big a deal.
I read the instructions before playing for once.. So I read that I had to left click to build stuff and press space to shoot.. and WD to move up down.
WD to move up down works really really smooth!
Space to shoot seems unreliable, not sure if intended or not but the range of the bolt varies greatly.
And I think the most concerning part was that I could not build anything! I'm clicking left right and center (probably in the wrong place eh?) but I have not managed to set up a building.
Needless to say, my fireballs could not keep up with the invading horde and I died, in all attempts in pretty much the same way :D
Let me know if I missed anything, I'll gladly give it another few goes with some buildings to assist my dark magic!
Congrats on your entry!
edit: After reading the comments, clearly I'm the only one that has not been able to figure out how to build anything.. But please do tell as I tried again just now and I just don't see it :D