Good game.
Nice Survivors-like game. The idea of build the roulette based on the upgrades is very cool.
Related to the controls, I think that firing and the spell casts could be aoutomatic, the player could still aim with the mouse of cours. But keep the mouse button pressing all the time and spamming the space bar to cast spells is and inconvenient in my opinion.
Also the constant colision with the enemies is a bit frustating, maybe give the player a short time of invulneravility to pass throught the enemies after hit one, it will help.