You can increase the inventory at any time; please take the following steps:
Open the game.
Tap on the Bird Team icon.
Below your team, you will see your current inventory and the amount of space you have left that looks similar to this example: INVENTORY: 15/50
Please tap the green + button
You will be taken to the in-game store with different inventory extension packages that require different amounts of gems.
Important: The current inventory cap is 200, and it cannot be increased further at this time.