Defeat slimes, get good... all in a small game? If your choice is to do missions, or if you want to defeat bosses, go ahead. There is nothing to lose, but remember to save.
Feature list:
WASD movement,
Dash,
Sprint,
Attack,
Defeat bosses,
Get achievements,
Gain and spend in-game currency from different activities,
Different missions to play,
Save your progress locally,
And many other.
But keep in mind there are automatic saves for settings, but not for gameplay.
Do you still think you can take the challenge? If so, then prove yourself!
