Well I decided that this should be digitised. Be nice and easy to check off.
| Priority | Details | Complete? |
| 1 | Allow agent-environment interaction | Yes |
| 1 | Allow specifiable number of rows and columns (columns < rows) | Yes |
| 1 | Allow modifiable piece distribution probabilities | Yes |
| 1 | Allow modifiable speed | Yes |
| 1 | Allow modifiable reward exponent | Yes |
| 1 | Have on-the-fly agent loading | Pretty much |
| 1/3 | Allow random seed to be set for the environment/agent | Yes/No |
| 2 | Show agent details for each step (via agent_message) | Yes |
| 2 | Performance graph (with variable x axis) | Yes |
| 2 | Show game details (lines made, total reward, episodes) | Yes |
| 2 | Savable agent states (saved policy) | No |
| 3 | Savable environment settings (and loadable + preset loading) | Yes |
| 3 | Experiment-mode (Queue multiple fields/agents for later comparison) | Yes |
| 3 | Optional GUI field (for speed) | Yes |
| 4 | Allow infinite field height (- Show top of field; Show number of rows beneath; Show total height) | No |
| 4 | Options for 1-piece and 2-piece Tetris (Show next piece) | No |
| 4/4 | Prefilled field – Drawn in with option to remove lines or hole-ify lines/Random field at y-height | No/No |
| 4 | Ensemble playing (multiple agents, possibly borrowing parameters) | No |
| 7 | Player vs. Computer | No |
| 8 | Shadow mode for seeing where a piece will land | No |
| 9 | Player vs. Player (with random inserting of almost lines) | No |
| 10 | Puzzle Kombat style fighting | No |