Thanks a lot for the review!!
Even i wanted to make music and sfx.... I thought of making them in the last 3 or so hours coz I finished the game, but then I realized unity WEBGL is a big pain to export...
About the issues :
1. I have never encountered that bug... maybe try refreshing the page...
2. The solution for this is making the colliders bigger and that is what I did, but once I built the game due to the bigger colliders the lasers completely stopped working...