I must be doing something wrong...
...Or the game is badly bugged for me. I click start, I get the level 1 screen, it tells me to 'collect two dots by clicking and holding'. I press okay, and I get a screen with a mission, 'collect two dots with exactly one ring', a timer, counting up, and two dots. I click and hold, and a movable ring appears. I positioned it around the dots, and released. Nothing happened. I made a ring that touched both dots. Nothing, I made an incredibly complex Venn diagram of extra rings. I restarted repeatedly, tried different methods, always nothing. Just the timer going up and two stationary dots.