Small games, and the code behind them.

Games

Open, play a round, put the phone down. No accounts, and every game plays offline.

• Blockfall

  A calm 8x8 block puzzle with a daily challenge and a Play Games leaderboard.

  About Blockfall Get it on Google Play

• Paws & Perils

  A cute paper cut-out roguelike with an idle RPG underneath: pick a hero, walk the trail, choose your path at every fork.

  Coming to Google Play About Paws & Perils

• Synapsy

  A calm daily memory game: pairs, sequences, grids and spot the change, with a three-minute Daily Workout.

  Coming to Google Play About Synapsy

Videos

Coding, algorithms and data structures, one language at a time. Every example on screen is real code with its real output. Python comes first.

• Video2 min 54 s

  Hello, Python: install Python 3.14 and write your first program

  Install it, run code two ways, and learn the one rule that makes Python look different from every other language.

  Watch on YouTube
• Video3 min 17 s

  Variables and types: the five basic types and how to convert them

  int, float, str, bool and None, how to ask Python what type a value is, and why "3" + 4 is an error until you convert.

  Watch on YouTube
• Video3 min 33 s

  Control flow: if, elif, else, for, while, break and continue

  How a program decides and repeats, with a chained comparison, range(), and the else a loop can have.

  Watch on YouTube
• Video4 min 24 s

  Strings: indexing, slicing, methods and f-strings

  Index and slice a string, why strings never change, the methods that clean text up, and f-strings, with a glance at 3.14 t-strings.

  Watch on YouTube

Articles

The same lessons, written down, with code you can copy.

• PythonBeginner

  Python strings: indexing, slicing, methods and f-strings

  Pick characters out of a Python string, slice pieces off it, clean it up with methods like strip and split, and build new text with f-strings.

  Read the article
• PythonBeginner

  Python for else: the else that means no break

  A Python for loop can have an else block, and it does not mean what you think. It runs only when the loop finished on its own, with no break.

  Read the article
• PythonBeginner

  Python chained comparison: 0 < x < 10 just works

  In most languages that line is a bug. In Python it is one test that means exactly what it says, and this note shows how Python reads it.

  Read the article

Work

Codesarray is created by Anand Rathore, a software developer. The day job, for more than five years, has been payment systems.