Please Update this game with the following features: Add more slots in the Inventory. Make a Character equipment and stats bar. Pet's stats must be viewable. Add some animation attacks. Fix a bug whereby the player sometimes don't attack when it cast's an ability. And make the pet controllable or upgrade AI Pet.
In start, get the engine and fuel to lvl 3. Then upgrade reduce fuel consumption a lot because you need more fuel to reach checkpoints. Then upgrade money to all your money in like 3 days. Then buy lvl 2 booster. Then good luck ^_^ ( Tip: If you want to get the hard badge, I suggest using the esc button. This will pause EVERYTHING that you see. then hovering your mouse at a safest point or turning your engine. I used this trick when trying to get the hard badge)
I suggest that you must have 2 battering rams, 1 Puppet and 3 dragons(any type) gives you a sure win on any type of battle. That's because the foe's front line could easily be destroyed in this type of army.