Japanese developer Kenta Cho might be best known round these parts for the shmups he's made under the name ABA Games, but they're far from all he makes. In 2014 alone he released 50 free browser-based minigames, from platformers to number puzzles, and has put them all together for your playing pleasure. "But Alice, that's an awful lot of games," you might well comment, "and surely some are a bit iffy, so where would I even start?" Handily, he's also ranked them all in order from, in his humble opinion, enjoyable to "borable". I've had a grand old time getting stuck in.
Poking through them and playing a few minutes or even seconds is a right lark, though they do have high scores to chase if you fancy settling. I won't ruin your own exploration, but will call out a few. His most enjoyable, From Four Sides is a pleasant avoid 'em up. Prominent Mountain has you raising and lowering the ground so a monster truck pulls sick jumps while dodging obstacles. Gemini You Do is a barebones rhymic shmup. SUM10 is a nice adding-up game. Don't See Me is an arcade stealth game. Scaffold Now is platforming inside Tetris.
Say, chums, we could compete against each other by e.g. starting our names with an "RPS-" tag. Don't look at any scores from 'Alice'; it's almost definitely a different Alice.
The games are open-source too, so you can get in and have a fiddle if you want.
Go on then, point us at a few you've played and liked.