# IsoCoaster

5 Hacker News commenters recommended IsoCoaster and 7 criticized it, November 2025 to November 2026. It was recommended in 1 of 13 months.

**Verdict:** Recommended as a fun theme park builder and a showcase of what pure web technology can do. Critics agree it runs slowly, with low framerates and lag, especially in Firefox.

## Why people recommend it

- Runs smoothly in Chrome or Safari (2 comments): "It definitaly runs slow on Firefox on my M1 Max (<10 fps). It runs butter smooth in Chrome for me on the same machine." ([source](https://news.ycombinator.com/item?id=46865371)) "it runs quite fast on a first generation mac studio with safari" ([source](https://news.ycombinator.com/item?id=46860064))
- Impressive showcase of web technology (1 comments): "Way too "dev design" to be fun to play, but a really awesome showcase of what can be done with pure web tech" ([source](https://news.ycombinator.com/item?id=46857698))
- Fun for a good while (1 comments): "I thought this was really fun and was hooked for a good minute." ([source](https://news.ycombinator.com/item?id=46861395))

## What people warn about

- Slow framerate, especially in Firefox (3 comments): "It definitaly runs slow on Firefox on my M1 Max (<10 fps). It runs butter smooth in Chrome for me on the same machine." ([source](https://news.ycombinator.com/item?id=46865371)) "Plays at ~3fps and with a ~1s latency on all interactions on Firefox" ([source](https://news.ycombinator.com/item?id=46858828)) "otherwise the framerate will drop quickly" ([source](https://news.ycombinator.com/item?id=46857519))
- Lacks polish and feels off (4 comments): "A lot of details don't make sense, graphics often look weird and performance is terrible" ([source](https://news.ycombinator.com/item?id=46862770)) "lacks the polish that makes games actually fun to play" ([source](https://news.ycombinator.com/item?id=46861982)) "the implementation is just off" ([source](https://news.ycombinator.com/item?id=46859614))

## Alternatives hackers recommend

- [TinyWind](https://hackerapproved.com/p/tinywind.md): 61 recommend
- [Starfling](https://hackerapproved.com/p/starfling.md): 59 recommend
- [Starcraft: Ashfall](https://hackerapproved.com/p/starcraft-ashfall.md): 46 recommend
- [Half-Life 2 in a Browser](https://hackerapproved.com/p/half-life-2.md): 42 recommend
- [Number Gacha](https://hackerapproved.com/p/number-gacha.md): 33 recommend

## Cite as

Hacker Approved, "IsoCoaster", https://hackerapproved.com/p/isocoaster/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).