I guess crashing could be the reason I'm the only one scoring in my 5. Game is working fine for me on my android device, hasn't crashed once. I'll load it up on my iOS device so I can see what the crashing looks like. Just updated that os to 9.3, so we'll see.
Edit: So my iOS device is an ipod touch running 9.3. I just logged in, got a boss, and smashed him with no crash.