Interesting concept combinig two diffrent games to make chaos :O The sound effects were on point and the music is fitting :]
Now lets addres the elephant in the room the game is increadibly hard :/ Maybe incresing the give rate of easy to use blocks like 4-1 block or 2-2 block can reduce the difficulty. Or you can give your spaceship force shield when clearing a line in tetris part that would be cool i think :p
Also if you could turn blocks around when in cornes that would be great :D
Overall it was definetly a chaotic experince i would like to play again if you decide to work on it amazing work !