From the first appearances it does look promising. Nice GUI. I also prefer GUI to terminal based tool.
For pacman GUI wrappers there is already Octopi and others like Bauh, GuiMan. Pamac, etc. Octopi is by far the gold standard.
Can you tell us more about Pakajo?
What are using as GUI libraries, GTK/QT/TUI or something else?
What does it add more compared to normal command line pacman or Octopi?