Create a 2D platformer game-maker app with two distinct modes: Build Mode and Play Mode. **1. Main Screens & Navigation:** - **My Levels Screen:** The main screen that shows a gallery of levels the user has created. Each level should be represented by a thumbnail. Tapping a level gives options to "Play" or "Edit". There should also be a "Create New Level" button. - **Build Mode Screen:** A level editor. This screen should have a main grid-based canvas for level design and a palette/toolbar at the bottom with all available game items. - **Play Mode Screen:** The screen where the user plays the level. It should render the level created in Build Mode and include on-screen controls for the player character. **2. Build Mode Functionality:** - **Item Palette:** A scrollable bar containing icons for all placeable items: - Standard Block - Lava Block - Player Spawn Point - Goal Block (e.g., a flag) - **Placing Items:** The user can tap an item in the palette to select it, then tap on the grid to place it. - **Block Customization:** - **Resizing:** When a user double-taps a placed block, show arrow controls to increase or decrease its size horizontally and vertically. - **Custom Texture:** When a user taps a placed block three times, open the device's image picker to let them select a photo to apply as the block's texture. - **Controls:** Include buttons to "Save" the level, "Play Test," and go "Back" to the My Levels screen. **3. Play Mode Functionality:** - **Level Rendering:** Dynamically build and display the level based on the saved data from Build Mode. - **Player Character:** - Include a default player character that appears at the "Player Spawn Point" location. - Implement on-screen controls: left/right arrows for movement and a button for jumping. - **Game Rules:** - **Collision:** The character should be able to stand on and collide with Standard Blocks. - **Hazards:** If the character touches a "Lava Block," they should "die" and respawn at the Player Spawn Point. - **Winning:** If the character touches the "Goal Block," display a "You Win!" message and provide an option to return to the My Levels screen. All level data, including block positions, sizes, and custom images, should be stored persistently in a database and linked to the user who created them.

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