The blue teleport platforms look futuristic and have different lengths which adds more interest. I like the placement of them throughout the levels and the particle effects on the exit portals clearly shows an appreciation for visual details. It’s interesting that the last boss turns into a blue teleporting platform but I think it would work better if it kept the same shape as the boss and if it takes you straight to an end screen. There is a bug on level 2 where the starting portal can lead the player skipping to level 3 if they die and it might be fixable by changing the angle of the starting portal. Fortunately I have got construct 3 so I was able to play your game and see the layout and events sheets but people without construct 3 will be unable to open the .c3p file. I would recommend exporting the game in the browser to be more accessible to everyone. To do this, go on construct 3 and you click on MENU > Project > Export > Select Web HTML 5 > click next > it will say download complete > then go on itch.io and in the top right corner you open your dashboard and when you find your game click on edit > scroll down to where it says Uploads and click on the red button to upload your zipped file > tick the box which says - this file will be played in the browser and I’d also recommend ticking the full screen button too

I'm not familiar with Construct 3, but it looks like you may have posted the project file for your game instead of a runnable executable file.