Thanks for the feedback! Yeah it's true you can just avoid the blue ones so it makes it easier for you xD So the eraser was there to be used as a shield that blocks the projectiles. This could make it easier to go through the obstacles. Now the blue powerups were filling the energy of the eraser since the shield can get broken after getting hit so much. We had this idea that if a projectile hit the eeraser it would bounce back and transformed into a bullet on your side. But it was harder to program in the small time xD again thank you for your feedback!