Puzzle Prototype - Number Puzzle

This is a puzzle prototype to mimic the style of puzzle found in the book, "Strimko Book 1: 150 Easy-to-Master Number Logic Puzzles" (buy it here on Amazon). There are both a 3x3 grid and a 4x4 grid.

Instructions

Click each circle to increase the number. Clicking an extra time will clear the number so resetting a circle is easy. The goal is to make sure no row, column, or connected "path" repeats the same number.

Puzzles are merely for proof-of-concept demonstration purposes only. No infringement is intended.