The digital world concept it's cool, but it fails in his execution. A game with a digital/virtual theme & with a beautiful waifu/loli aren't enough to have a good game. And I say it for some factors:
1. She is very slow when jumping and running at the same time since first second from this action, and it is worse when reaching very near platforms.
2. Using the mouse for the dash is sometimes not feasible. In certain PCs the cursor doesn't recognize the program or it is outside and when you click it will exit on the window.
I would recommend that you also use the buttons W/S for WASD or Z/X for arrows.
3. The level design it would also need some improvements.
For example, It gets repetitive (until distracts) that the levels are full of spikes until they cover in areas where they are unnecessary (despite small variations).
The names from some stages (like 3, 4 or 12 "Ninja House") indicate that perhaps they need backgrounds that accompany the virtual aesthetics of the game. Along with tileset variations it would make more recognizable to the player.
The start zones from each stage look very similar to each other.