What is the hardest/most challenging level all of you have gotten stuck on so far? Let's try help each other out with tips on how to get by!

Your save game data is stored in the file "profile" and can be found in following locations: Windows: C:\Users\Username\AppData\LocalLow\NiYOtan\mikapyon\ Linux: ~/.config/unity3d/NiYOtan/mikapyon/

Play in short sessions! Especially later levels need a lot of concentration so playing only 1 or 2 each session might be best! Finish levels first without going for 100 stars, that way you unlock other levels and progress faster! Many stars can be collected on the way! The last zone requires "moons" to unlock levels (the silver / colorful orbs at entrances / goals). You get moons by completing a level, getting 100 stars before reaching the goal and by beating the best-time in a level!...