Brick Escape: Block Puzzle

I have a question. What are the stars, how do you get them, why do I only get one star when I've finished a level? Is there something I'm missing? Does it have to do with efficiency? Level 198. How could I have done that any better? I play the game anyway. I don't care if I only get one star. It's still fun! Unless I have to use a hammer and cheat! Not fun!

I like the game but often the challenges are not just exiting the blocks; moving them smoothly & judging which is a movable block or a stationary part of the game board, can be frustrating. Some levels the whole board had the look of wood blocks but some are barriers & i kept trying to move them. But i do like that the ads between levels are relatively short & boosters are generously given. I don't have a clue what the coins are for. To spin the wheel & get coins rather than a booster feels more like punishment than a reward. What can one do with coins? Anyone got a clue?

Every level is able to be won if you can just figure it out…I like the challenge and you’re not timed so there’s no pressure.