Thanks for playing. Happy that your appreciate it :)
You can get twice the same upgrade. It's wanted, really it is. I don't know if you know the game Archero, that we were inspired to do ours.
I'll explain you simply. We choosed to have a pool of upgardes, each upgrade has the same amout of chance to appear. The program choose 3 in the pool (where there are many times the same upgrade). That's it, simple.
I can understand that you don't like, but many games like ours, do that. Check our Archero if you will.
And for the enemies, yeah it's anoying, we will investigate on why it's happening after the jam. But yeah... 48h bugs I supposed :D
Thanks again ;)