What are some alternatives?
When comparing novastarapps.com Cats Match 3 and CodeSignal, you can also consider the following products
Nonograms Katana - Nonogram puzzle game with gorgeous, Japanese influenced visuals.
Codewars - Achieve code mastery through challenge.
Human Resource Machine - Tomorrow Corporation is an independent game developer behind indie games Little Inferno and Human Resource Machine
CodinGame - CodinGame provides users with a fun and effective way to learn coding that eschews the rigid structure of traditional teaching methods.
Armor Games - Play free online games at Armor Games! We're the best online games website, featuring shooting games, puzzle games, strategy games, war games, and much more...
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.