• Colorful art, clean animations
  
• Customizable builds via randomized selection of upgrades
  
• Experience is cumulative, unlocking more powerful upgrades and tiers
  
• Collectible currency is spent on meta progression like HP, speed, and so on
  
• Interactive environmental elements (explosions, fellable barriers, a mount, recovery, vaults)

• Inability to de-select less desirable powers, once unlocked, all are dumped into the pool
  
• Environmental elements are somewhat rare. This can be frustrating for reasons of survival (can't find health, escape, or cover) and progression (currency is hard to find / too dangerous to reach)
  
• You can only control movement. While one or two powers can be aimed by the direction you face, the rest are all automatic, so when boxed in by enemies, your survival may come down to luck (whether you crit / frenzy or not)
  
• Minor optimization issues once the screen becomes filled with sprites

Achievement Hunters: Fairly self explanatory achievements; Find the cow, step on the pressure-plate during the day, clear the game one time. The chickenman requires the egg mutation to trigger frenzy, so keep choosing it until that happens.

The last two are perfectionist achievements; To make these easier, attempt them only after upgrading speed, frenzy, and criticals. The strategy is basically the same for each... the stronger your offence, the better your defense. Frenzy is powerful enough to wipe the screen, so increasing your chances of the better powers triggering makes this a lot easier. Cyclops, vulture, spikes, and ground pound was my build on clear. You can gamble on fly eyes (dodge) to maybe save you if you mess up, but it's preferable to invest in attack speed and power if no other good choices. Good luck.