The timer/countdown is gonna be enabled by default unless you spend gold in the hug are in "Dungeon Room" to not have it. On first day it costs 0 gold to not have a timer.
The timer/countdown is the circle in top right corner as you play. The red color is your total time left, and the green is your bonus time with a buffer for whenever you jump on crates, collect coins and open new doors.
I hope I am going to have some good tutorial notes in future to make everything clear.
"what is the leftmost bar? the second one seems to be mana recharging."
You are correct, the second bar is your mana regeneration, the first bar is for your power jump ability and hover jump ability, which you switch to by pressing number keys, or use your mouse scroll wheel. Little placeholder graphic indicating which jump ability you have enabled is in bottom right corner. power jump and hover jump work by holding down the jump key. Bear in mind different abilities can have different mana cost.
Thank you for all the feedback, and playing my game. Even if it is just explaining the game, it gives me a good idea what I will need to include in tutorial