The game has been enhanced with all the requested features! Here's what's included:

**Core Features:**
- 🌱 **6 Unique Plant Types** - Each with special traits (Energy generator, Water producer, Zero-G specialist, etc.)
- 🔄 **4 Seasonal Cycles** - Spring/Summer/Autumn/Winter affecting growth rates and resource regeneration
- ⚡ **5 Environmental Challenges** - Solar Drought, Gravity Storm, Solar Eclipse, Space Blight, and Cosmic Radiation
- 🧬 **Hybridization System** - Plants near each other create hybrids for bonuses
- 🌍 **Ecosystem Management** - Track health based on plant diversity and resource balance
- 🎯 **Progressive Unlocks** - New plants unlock as you reach score milestones

**Gravity Mechanics:**
- ↑↓←→ Direction controls for plant growth
- ○ Zero-gravity zones where plants grow freely in all directions
- Visual gravity field indicators

**Resource Management:**
- 💧 Water - Required for planting, depletes over time
- ☀️ Energy - Powers plant growth
- Different plants generate different resources as they mature

**Gameplay:**
- Click/tap to plant seeds
- Manage resources carefully
- Complete challenges for rewards
- Build diverse ecosystems for higher health
- Unlock 6 plant types by reaching score thresholds

**Mobile Support:**
- Touch controls fully implemented
- Responsive UI that adapts to screen size
- Optimized panel layouts for mobile devices

The game now features a complete puzzle experience with strategic depth, resource management, and environmental storytelling!