Mindblock

Mindblock plays similar to Rummikub in that players have a hand of items and want to play them into a common space in sets and runs, with those sets and runs being breakable should you be able to rearrange things in order to play more from your hand.

What's different about Mindblock is that players can stack smaller blocks together in order to use them as a larger number, giving you more play opportunities to get pieces out of your hand.