s you may get away with smaller networks.
- `spec.alpha` controls the learning rate. Everyone sets this by trial and error and that's pretty much the best thing we have.
- `spec.experience_add_every`: REINFORCEjs won't add a new experience to replay every single frame to try to conserve resources and get more variaty. You can turn this off by setting this parameter to 1. Default = 5
- `spec.experience_size`: size of memory. More difficult problems may need bigger memory
- `spec.learning_steps_per_iteration`