1. Launch the game "Block Puzzle Ocean" on your mobile device.

2. Observe the 8x8 grid, which is the main play area where you will place blocks.

3. At the bottom of the screen, you will see a set of different shaped blocks available to use.

4. Drag a block by touching and holding it, then move it onto the grid and release to place.

5. Strategically arrange the blocks to fill up entire horizontal rows or vertical columns.

6. When a row or column is completely filled, it will be cleared from the grid, and you will earn jewel rewards.

7. Continue placing blocks carefully to keep the grid clear and create more space for upcoming pieces.

8. Plan ahead by visualizing where each block can go to avoid running out of space.

9. New sets of blocks will appear once all current blocks have been placed.

10. The game ends when you can no longer place any of the available blocks onto the grid.

11. Try to keep playing as long as possible to achieve higher scores and collect more jewels.

12. Use logic and spatial thinking to improve your gameplay and train your brain with each session.