When I reviewed I Hate Running Backwards, one of my biggest complaints was the uneven difficulty balance. Due to the procedural generation, certain levels could end up being dramatically harder than subsequent levels and restarting meant dealing with occasionally unfair odds. This became compounded by the fact that quitting the game meant your unlocked shortcuts reset, thus forcing you into finishing it in a single, prolonged sitting if you hoped to reach the conclusion.
Thankfully, all of that has been fixed and the game is a lot better off for it.
Source: Destructoid I Hate Running Backwards’ first patch brings out the greatness in the game