gifts not stacking? i keep getting gift boxes from quests and just in game - they aren’t stacking in the bottom left so i cant open them

This is a cool game. It reminds me a lot of another game called Simple Strider, it's part of the Big Time app by WINR Games. You can win money for playing the same game check it out: https://www.winrgames.com/wgw/gamedesc/G10 If you like Daddy Long Legs you'll like Simple Strider too

What is the little blue box with a white question mark for?

once you are familiar with the game controls and can get a decent amount of meters regularly, try staring at your shadow while playing. it helps me for some reason!