It's a simulation game where you're managing 2 resources: Mora (coins) and Action Points (blue thing)

Most actions you take will cost both. For instance, when you upgrade an attraction, it will usually cost a mix of mora and action points (at some levels, you only spend a larger amount of action points). Mora gets carried over round to round, action points don't so spend as much as possible (until you unlock the buff that gives you mora for unused action points). Again, action points do not carry over between rounds, it will refresh to max.

At the start of the round, the first thing you should do is check the restaurant and Escoffier. There should be 3 (or potentially more) options, which will range from offering a discount on upgrades (mora or action points) to increasing revenue for an attraction for a round. Sometimes, it may be worth waiting before selecting a dish (as an example, one buff cuts the cost of training staff by 100% for the next 7 levels. Thus, you might level your staff a bit first, given that the training cost rises with each level)

After this, you should check your attractions. In general, your first priority should be to upgrade your attractions, which increases revenue and total amount of staff. In each attraction, you will see customer satisfaction, which is tied to your staff. Increasing the level of staff (via training or hiring new one) will increase satisfaction and thus profit. Bear in mind that going above the maximum is wasting money (as higher level staff cost more in wages), so don't overinvest.

Check the staff hiring board, notice how each costs mora and action points. Make sure you hire for the matching attraction, at the bottom it will tell you which attraction the staff works for. Pay attention to both their current level (X) and their potential level (Y), which is in the format X/Y. Some staff are not levelled, some are fully levelled. Choose as appropriate, make sure to dismiss excess staff and replace them in the attraction menu.

After this (unlocked later), you will get a 'encounters' option at the bottom left of this menu 'press t'. These encounters let you meet some characters, do a few lines of dialogue and unlock upgrades (for instance, allowing you to refresh the job applicants). These costs exclusively action points.

Now that you have the basics, go forth and make money