The 3D particle effects look great! However, I found the controls a little awkward. One thing you might consider is either making the field itself an interactable area so tapping a spot on the grid sends the block to that space, or overlay the controls on or around the block somehow. In its current form, I have to keep looking down at the controls which takes my eyes off the incoming projectiles, so I end up moving into projectiles or just get killed because I'm busy trying to press the movement button.
This is not to say that the game is bad; it's actually good simple fun! I think with just a tweak to the control system this could be a real winner. I think this could also be iterated on pretty easily with new mechanics like for example new map layouts, different projectiles to dodge, and different block sizes.