First and foremost, congratulations on your participation in the game jam, And here is my feedback:
1- At first glance, I thought the mouse would be the primary game control, but I was confused by automode and arrow key control.
2- I'm not sure if I should place the orbs on player, enemies, or specific slots?.
3- Adding more sounds and visual effects will improve the game even more.
4- The UI is simple but could be more polished (no harm, I didn't have time to improve our entry either, but it's just as important as other game design elements).
Best wishes.