Again, I thank you all for the honest feedback and tips on how to improve the game. Here are the changes made:
A redesigned Main Menu screen
A greeting message that varies depending on what time of day it is for you, and includes your Steam username as well, meaning that the game has now been fully integrated with Steam API.
New Siunaus (developer) logo on the startup screen
A new brightness slider for less eye strain
Made level 1 even easier, with only one insta-kill laser
Revamped the reset mechanism, now followed by an animation sequence, as well as the music not starting over when dead/reset as well as restarting after finishing the level.
Added a button for exiting the level selection screen
Added additional guiding for tricky parts of the levels
Reworked gravity system, the player now falls faster and more realistically, levels have been adjusted for the new system.