Downhill Smash

The actual gameplay is fun, to upgrade your character you NEED to spend money on gems OR sit and watch adverts for 30 mins... There is no other way you NEED gems to upgrade your Fuel, Damage, Mass, etc. There will 100% be a point you will have to spend gems to upgrade. It gets to a point where the game asks for 150+ gems to upgrade 1 tier POS. When I play a game, I actually want to PLAY IT, not sit and watch ads for 30 mins just so I can SLIGHTLY progress? Don't waste your time with this one.

The game is fun, not intrusive ads, you get bonuses if you want by watching ads BUT the game is so unfair. It doesn't matter how much you spend in upgrades, you will always be really close to the avalanche specially when you reach a zombie boss. Also, even fully upgrading weapons it will take a single stone cone to kick you back directly to the avalanche. If you manage to pass stages, is either by luck or paying, no skills at all.

Some upgrade tiers are locked behind premium in game currency (gems) which is incredibly obnoxious and greedy. To make matters worse gems aren't easily obtained without spending money. You can watch ads but they aren't always available. Also, maybe I missed it but the game mechanics aren't explained very well or at all. Like the distance based rewards. I'm guessing you have to buy a pass to get those but they never really explain that. Or what keys are for.