Thank you! I really appreciate your reply. There is a game menu where you can restart level. If you play with touch, there is a menu button in the right upper corner. If you play with keyboard then the game menu is opened with Esc key. This is great feedback, players may not know there's a game menu, I should add some hint for it or so. Which level were you stuck in? We test this so carefully, but physics-based game can be unpredictable easily :) You are the first ever who commented this game on internet :)