How to play

• Enemies walk the road from left to right; each one that reaches the end costs a life.
• Towers can only be built on the grass, never on the road.
• Clicking your own tower upgrades it: more range and more damage.
• Starting a wave early pays a bonus — the sooner you call it, the bigger it is.
• Unspent money earns five per cent interest between waves.

Tips

• Put the slowing tower at the first corner; everything behind it gets more time to shoot.
• Two cheap towers usually beat one expensive one until the enemies gain armour.
• Build along the longest straight, not at the entrance — the road passes some cells twice.
• Save during easy waves: interest plus an early-start bonus funds a whole upgrade.