Quick question to start off: is there a way to speed up/skip the score tally at the end and to straight to the results so I can get to the next level? Sometimes, the score tally even does a fakeout and adds some more after a pause and it gets tedious fast....

2. Is there any indicator (apart from just earning them) how many points you need to get a certain amount of stars?

3. How do you unlock levels? There's no indication in-game I can see.
(I assume you have to pass every level before but I can't even tell if I've finished a level unless it has stars.)

One thing I noticed is that there doesn't seem to be any "invicibility frames". If you have 2 health and crash into 2 enemies close to each other, you instantly die.