Wippe-lig!

From BoardGameGeek:

Can you rock the game board in Wippe-lig! to line up your discs? To set up, place the wooden seesaw game board on the table, then place one white disc in each of the four grooves. Each player takes five discs in a color of their choice. On a turn, you either: Place one of the discs in your supply into any groove on the raised side of the game board, or Remove any disc already in a groove, then place it into a groove on the raised side of the game board. To end your turn, tilt the game board. If three or four of a player's discs are now in a line, whether in the same groove or across multiple grooves with no other discs between them, that player wins, regardless of whose turn it is. If 3-4 white discs are in a line after tilting the game board, remove these discs from play for the remainder of the game. Note that removing these discs might cause other discs to roll and set up a winning line.