I think you need 1000 score to get 5 stars. Nab a high points Guy as soon as possible (may have to retry a few times to get a good one, I got the 1k points with a guy who gave 21+ points a year at around 20 years old) and the points will mass up over time. Make sure to grab all career folders, roses, diamonds, and chocolate, then avoid skulls and girls.
I just figured out DRILLING SINGLE BLOCKS MAKES SKULL BLOCKS APPEAR. Thought they just start appearing after so long, had many of those dam things on the screen when fighting the final boss n_n
Only certain characters work. Once in game though there's not much to do. Characters speech text is in polish or dutch I think but when walking to end of the map your char says "no no no!" in English. Yellow cubes give 100 exp and npcs are white cubes... you probably should have waited a bit longer before releasing this preview because its probably just gonna be rated down a lot before there is anything worthwhile.
I just got the impossible badge and I uhh... I think I'm a worse person for it. I'm gonna have to play a whole lot of "Bloons" before I have any kind of respect for balloons again.