Cosmic Express vs Happy Color® – Coloring Games

How do Cosmic Express and Happy Color® – Coloring Games compare on difficulty, ad pressure, in-app-purchase pressure and what real reviewers say? A side-by-side look, grounded in App Store data.

	Cosmic Express	Happy Color® – Coloring Games
Genre	Puzzle	Puzzle
Price	Paid	Free
Difficulty	hard	easy
Ad intensity	none	high
In-app-purchase pressure	none	medium
Typical session	variable	variable
Rating	4.8 / 5	4.8 / 5
Ratings count	198	3,398,350
Reviews say	What players like Elegant, devilishly tough puzzle design that rewards creative thinking Cute aesthetic and satisfying gameplay loop with adorable aliens No ads, no lives system, no pay-to-win mechanics—pure puzzle solving Common complaints Difficulty spikes can feel random; some levels appear physically impossible without external help No built-in solution viewer causes frustration when stuck for hours on single levels Limited accessibility for casual players; becomes very complex quickly after tutorials	What players like Calming and meditative for anxiety/ADHD Vast library of pictures including Disney content Satisfying animated playback on completion Common complaints Excessive ads interrupt coloring mid-session Ads pop up and open browser tabs without permission Touch sensitivity issues requiring multiple taps

Cosmic Express — A deceptively cute train-routing puzzle game with hundreds of brain-twisting levels that challenge you to think in new ways. (rated hard difficulty, none ad pressure) Happy Color® – Coloring Games — A relaxing color-by-numbers game with 40,000+ pictures designed to calm anxiety and ADHD through meditative coloring. (rated easy difficulty, high ad pressure)

Data: Apple App Store, as of 2026-08-24. Last updated 2026-08-24.