Maybe some players missed the game's main mechanic, just like I did at first. At first, I struggled because I thought I couldn't earn enough time to finish the level. After playing for a while, I realized that defeating enemies adds time to the timer, and I also needed to read the messages written on the walls. That was the biggest thing I had missed.
The game is really good. I especially like that the levels are randomly generated instead of being the same every time, which keeps each run fresh.