Not only is the jumpless control scheme a key part of gameplay, but once you get good at this game, you don't even use WASD or the arrow keys, just the mouse and numbers :)
As a fan of all the Hey wizard games, I understand that having no jump button isn't lazyness, it's a KEY PART OF THE GAMEPLAY. Awesome game. Kinda prefer the "put points into each power" over the "level per use" system, but still 5/5