Anyone developing in Mixed Reality deserves credit for embracing the newest approach to VR, and for that, I salute you. It's a quick and fun little shooter, but I quickly got overwhelmed by the amount of bubbles, and they didn't necessarily seem constrained by my playspace. Adding haptics to firing the gun and/or popping the bubbles would help increase the 'digital objects in real space' illusion? Alternatively, adding some ricochet/persistence to the lasers might provide a little bank/trick/billiards style shooting, so a single shot could maybe claim more than one bubble?
(It's also possible I didn't have my full spatial data set up, which is why the bubbles quickly escaped my 'room'?)
Great job!