It's a good demo, it takes about 15-25 minutes, the mechanics of the game are comparable to the simplest platformer. Of course, there were also bugs (there are many of them):
1. If you hold down A and D, the character continues to run, but in place. 2. In a close encounter with an opponent (the enemy's texture overlaps), neither the player nor the opponent can deal damage.
3. On the 2nd level, you can see a little bit what is happening on the lower floor, there is also no background on the lower floor, and there is no sign with recommendations for using invisibility potions at the moment with electric balls.
4. FPS drawdown to 15-20 at the 2nd level.
5. Sometimes, when a player dies and is reborn, the language may change (from Russian to English).
6. Also, with low fps at the 2nd level, you have to wait 2-3 seconds for the double jump to work.