Optimizing games for weak devices is a key challenge for indie developers trying to make their projects accessible on a wide range of hardware. Here are some practical guidelines:

1. Deferred optimization: Focus on creating a complete gameplay experience before you start optimizing. Avoid premature optimization, which can distract from core development tasks and lead to resource overruns.
2. Performance profiling: Use profilers to analyze game performance, identify bottlenecks, and make informed decisions to improve performance. This is especially important when resources for testing on different devices are limited.
3. Optimize graphics resources: Tune textures and models to match the capabilities of weak devices. Use platform overrides to optimize assets, avoiding increased build size and unnecessary memory consumption.
4. Limit camera usage: Minimize the number of simultaneously active cameras in scenes to help reduce CPU load and improve performance.
5. Testing on target devices: Conduct regular tests on weak devices to make sure the game is stable and identify potential performance issues in a timely manner.
6. Code optimization: Write efficient and clean code, avoiding unnecessary calculations and operations that can slow down a game on weak systems.

By following these guidelines, indie developers will be able to create games that are accessible and appealing to a wide audience, regardless of the technical specifications of their devices.