omg please just take away the garden mechanics, and keep the bullet hell, dodging, and weapon aspects and just keep the rougelike mechanics. make procedurally generated levels, or have hard bosses with patterns to memorize, that game would be my favorite web game ever. A 2D BLOODBORNE. Add the guns, more weapons, bosses, fast paced gameplay, with a unique bullet hell to add to the 2d gameplay. I have never seen something like this except ENTER THE GUNGEON, and i friggin love that game.
Still, awesome game though ;)