Nice idea and execution. Pure red/blue is maybe not the best colour scheme, but I think it works better than it has any right to. The audio is also quite nice.

As already mentioned by others, it doesn’t seem to be possible to jump off an edge by pressing D + Space. Instead, you plunge to your death.

In would also be nice to start at the beginning of the current level after death, instead of the level selection screen.

It is nevertheless a fun game (albeit sometimes frustrating).

I had fun playing it! Level 6 is frustrating. I tried speed running to beat it, and I did beat it!

Here is my feedback:

What Did I Like?

• I liked the mechanics and the gameplay of the game.
• Nice level design.
• UI/UX design good! (Excluding the "You Win" screen, you messed it up a bit here!)

What Did I Dislike?

• Not a good colour combination.
• Falling, game over displays, you click retry, and then level selector shows up. That's not good.
• Level 5 and 6's difficulty is imbalanced.

To Fix

• You can't jump from the corners. This issue made the game frustrating.
• You can't switch to full screen on the web version of the game, while there is a full-screen button.
• A bug! I was going to show you why the "You Win" screen isn't good, I opened the screenshot app, and somehow the tools' name went away! {1]

Suggestions

• Add the ability to move with the arrow keys.
• Automatically reload the game when losing.
• Make a delay of 1 sec or so before displaying "You Died".
• Make level selector buttons could be pushed down (like the others).
• Add a timer that shows how long did I spend to finish the level.
• Show the level selector only ones I press "Play" to start the game.
  

Endnotes
[1]

Fun game! I thought the level design was great and explored the mechanic well. The music was good for your first time, nice job! I the high contrast of the colors was a bit straining on my eyes but besides that well done!

Great game! I like how you utilized the old Mario trick to skip an entire level by hiding some hints! The level design is pretty good in my opinion and I love how you have a clear tutorial level at the start to explain how the game works. Maybe a tiny animation on the character's legs when it is moving would have been a great addition, but I think you made up for it with great levels! Good job!

nice game
just one thing need to be fixed just when you win a level just load the next level and also when u die in a level just restart the level no need to go back to the level menu it's so annoying
but overall very good game