Nice effort. Please keep working to expand the game! Absolutely love the graphics, especially the drone.
I wish putting in coins filled up a 0/4 credits meter and the game would automatically start when full to complete that arcade-like experience.
For adding in WASD controls. Try taking your events that read up/down/left/right input and add an OR block in each, then add an additional condition that reads the WASD version. Example "If player presses UP" OR "If player presses W".